--- product_id: 413938665 title: "140mm 3mm Mains Tester Plain Slot Blade Neon 100-500Volts Circuit electricians Electrical Voltage Pen Flat Screwdriver Transparent Safety Insulated Handle Pocket Clip" brand: "toolstek" price: "€ 9.27" currency: EUR in_stock: true reviews_count: 8 category: "Toolstek" url: https://www.desertcart.sk/products/413938665-140mm-3mm-mains-tester-plain-slot-blade-neon-100-500volts store_origin: SK region: Slovakia --- # 100-500V voltage range Neon indicator for live circuit detection 140mm length, 3mm slot blade 140mm 3mm Mains Tester Plain Slot Blade Neon 100-500Volts Circuit electricians Electrical Voltage Pen Flat Screwdriver Transparent Safety Insulated Handle Pocket Clip **Brand:** toolstek **Price:** € 9.27 **Availability:** ✅ In Stock ## Summary > ⚡ Test Smarter, Work Safer — Never Miss a Live Wire! ## Quick Answers - **What is this?** 140mm 3mm Mains Tester Plain Slot Blade Neon 100-500Volts Circuit electricians Electrical Voltage Pen Flat Screwdriver Transparent Safety Insulated Handle Pocket Clip by toolstek - **How much does it cost?** € 9.27 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/413938665-140mm-3mm-mains-tester-plain-slot-blade-neon-100-500volts) ## Best For - toolstek enthusiasts ## Why This Product - Trusted toolstek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Portable Power Tool:** Compact 140mm design with pocket clip keeps your essential tester always within reach. - • **Precision Engineering:** Slim 3mm slot blade fits standard outlets and terminal blocks with ease. - • **Ergonomic & Transparent:** Comfort grip with clear insulated handle ensures safety and visibility during use. - • **Trusted Safety Compliance:** CE certified for reliable performance and peace of mind on every job. - • **Instant Live Voltage Detection:** Neon indicator glows bright on 100-500V live circuits for immediate feedback. ## Overview The TOOLSTEK 140mm Mains Tester is a compact, CE-certified electrical voltage pen designed for quick and safe detection of live circuits between 100-500 volts. Featuring a neon indicator embedded in a transparent insulated handle and a precise 3mm slot blade, it offers professional-grade reliability and portability for electricians and DIY pros alike. ## Description TOOLSTEK 140mm 3mm Mains Tester Plain Slot Blade Neon 100-500Volts Circuit electricians Electrical Voltage Pen Flat Screwdriver Transparent Safety Insulated Handle Pocket Clip : desertcart.co.uk: DIY & Tools Review: Good - I recently added the TOOLSTEK WOKIN 140mm Mains Tester to my toolbox, a straightforward tool designed for testing electrical circuits within the 100-500 volt range. Here’s a detailed look at its performance and utility. Functionality and Ease of Use The TOOLSTEK WOKIN Mains Tester is aimed at providing a quick and easy way to check for live circuits. It features a plain slot blade tip that easily inserts into standard outlets and terminal blocks. The neon indicator in the handle lights up when the tip detects voltage, which makes it very user-friendly even for those who aren't professional electricians. This tester is particularly useful for quick checks around the house or on job sites. Design and Build Quality With a length of 140mm and a blade width of 3mm, this tester is compact and easy to handle. The build quality feels robust, capable of withstanding the rigors of frequent use. The handle is designed to be comfortable to hold, which is a plus during extended use. The inclusion of a neon light within the handle is a simple yet effective design choice that offers clear visibility and immediate feedback. Safety Features Safety is paramount when dealing with electrical testing, and this tester is equipped with basic features to ensure user safety. However, it’s important to always ensure that the tool is used within its voltage range and operational guidelines. While the tester does a good job for its intended use, additional insulation on the handle would be beneficial for enhancing safety during use. Portability This mains tester’s size makes it highly portable. It can easily be carried in a pocket, toolkit, or even clipped to a belt, which is ideal for those who need to move around or climb ladders while working. Value for Money For a tool that performs a crucial function, the TOOLSTEK WOKIN Mains Tester is reasonably priced. It’s not only affordable but also reliable for basic electrical testing, making it a great value for both DIY enthusiasts and professional users. Overall Impressions The TOOLSTEK WOKIN 140mm Mains Tester is a handy tool for anyone needing to check for live electrical circuits regularly. It offers straightforward functionality, decent build quality, and practical design, all at an affordable price point. While it may not have the advanced features of more sophisticated testers, it perfectly fulfills the role of a basic voltage tester, making it a worthwhile addition to any toolkit. Review: Best - Best ## Features - Mains Tester Screwdriver is fitted with a neon indicator in the clear plastic handle which illuminates when the point of the tester is touched on a live voltage source of between 120-250 volts and an earthing contact is made with the metal stud on the top of the handle. - Main tester is fully insulated and is supplied complete with full operating instructions and will perform the following tests: continuity, bulbs, fuses, short circuits, cable tracking, mains sockets and microwave oven leakage. - Main tester will test electricity up to 250 volts. Hold the Main tester by the insulated handle, do not touch any part of the exposed metal blade. Always test the Main tester before you start by contact with a known live power source. You do not need to touch the touch pad at the top of the Main tester (although it is perfectly safe to do so). - The red LED will glow brightly when the Main tester metal blade is in contact with a live circuit, indicating that it is functioning correctly. - Hold the index finger against the cap end of the electric pen, thumb and middle finger, and gently pinch the electric pen with your ring finger to keep it stable, and then insert the metal nib into the socket panel hole on the wall or the external power strip socket hole. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B099PPSQMH | | Best Sellers Rank | 6,133 in DIY & Tools ( See Top 100 in DIY & Tools ) 10 in Voltage Testers | | Brand | TOOLSTEK | | Colour | Transparent | | Country Of Origin | China | | Customer Reviews | 4.5 out of 5 stars 410 Reviews | | Included Components | SCREDRIVER | | Manufacturer | WOKIN | | Manufacturer Part Number | TK-1053 | | Maximum Operating Voltage | 500 Volts | | Min. Operating voltage | 100 Volts (AC) | | Minimum Operating Voltage | 100 Volts (AC) | | Number of Items | 1 | | Number of Packs | 1 | | Power Source | Electricity | | Power source | Electricity | | Specification Met | CE | | Specification met | CE | | Style | Safety | | Style Name | Safety | | Unit Count | 1.0 count | ## Product Details - **Brand:** TOOLSTEK - **Colour:** Transparent - **Min. Operating voltage:** 100 Volts (AC) - **Power source:** Electricity - **Style:** Safety ## Images ![140mm 3mm Mains Tester Plain Slot Blade Neon 100-500Volts Circuit electricians Electrical Voltage Pen Flat Screwdriver Transparent Safety Insulated Handle Pocket Clip - Image 1](https://m.media-amazon.com/images/I/51GSDcPTzwL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good *by P***. on 15 July 2024* I recently added the TOOLSTEK WOKIN 140mm Mains Tester to my toolbox, a straightforward tool designed for testing electrical circuits within the 100-500 volt range. Here’s a detailed look at its performance and utility. Functionality and Ease of Use The TOOLSTEK WOKIN Mains Tester is aimed at providing a quick and easy way to check for live circuits. It features a plain slot blade tip that easily inserts into standard outlets and terminal blocks. The neon indicator in the handle lights up when the tip detects voltage, which makes it very user-friendly even for those who aren't professional electricians. This tester is particularly useful for quick checks around the house or on job sites. Design and Build Quality With a length of 140mm and a blade width of 3mm, this tester is compact and easy to handle. The build quality feels robust, capable of withstanding the rigors of frequent use. The handle is designed to be comfortable to hold, which is a plus during extended use. The inclusion of a neon light within the handle is a simple yet effective design choice that offers clear visibility and immediate feedback. Safety Features Safety is paramount when dealing with electrical testing, and this tester is equipped with basic features to ensure user safety. However, it’s important to always ensure that the tool is used within its voltage range and operational guidelines. While the tester does a good job for its intended use, additional insulation on the handle would be beneficial for enhancing safety during use. Portability This mains tester’s size makes it highly portable. It can easily be carried in a pocket, toolkit, or even clipped to a belt, which is ideal for those who need to move around or climb ladders while working. Value for Money For a tool that performs a crucial function, the TOOLSTEK WOKIN Mains Tester is reasonably priced. It’s not only affordable but also reliable for basic electrical testing, making it a great value for both DIY enthusiasts and professional users. Overall Impressions The TOOLSTEK WOKIN 140mm Mains Tester is a handy tool for anyone needing to check for live electrical circuits regularly. It offers straightforward functionality, decent build quality, and practical design, all at an affordable price point. While it may not have the advanced features of more sophisticated testers, it perfectly fulfills the role of a basic voltage tester, making it a worthwhile addition to any toolkit. ### ⭐⭐⭐⭐⭐ Best *by A***R on 22 August 2026* Best ### ⭐⭐⭐⭐ Absolutely fine for a quick cable test. *by J***N on 1 January 2026* Cheap but does the job. Successfully identified a live wire. ## Frequently Bought Together - TOOLSTEK 140mm 3mm Mains Tester Plain Slot Blade Neon 100-500Volts Circuit electricians Electrical Voltage Pen Flat Screwdriver Transparent Safety Insulated Handle Pocket Clip - Faithfull FAITAPEPVCBK Black PVC Electrical Tape 19mm x 20M - KAIWEETS HT100S Voltage Tester, Dual-Range 12V-1000V/70V 1000V Non-Contact Electric Tester, Sensitivity Electric Compact Pen with NCV, LED Flashlight, Buzzer Alarm, Wire Breakpoint Finder --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/413938665-140mm-3mm-mains-tester-plain-slot-blade-neon-100-500volts](https://www.desertcart.sk/products/413938665-140mm-3mm-mains-tester-plain-slot-blade-neon-100-500volts) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-11-13*