What size shank are the drill bits?

The WOWSTICK DRILL kit has 8 drill bits made of hardened steel: 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm, it allows 420r/min ± 10%

Is there any way to use a 3 mm drill bit with this?

I don't think one would fit and if it would I suspect the motor would not be strong enough to drill with it.

How many drill bits are there in total?

What I received were 8 drill bits, a pen-type main unit and an exquisite storage box.

how is this for sanding or grinding on a resin printed model?

I have only used this as a drill. I don’t think it is designed to use for grinding or sanding. With resin I use a dremel , file or hand sand. It is a great tool for a precision drill. Highly recommend it.

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Description

🔧 Drill smart, drill sleek — your pocket-sized power tool revolution!

ONE TOUCH CONTROL - Effortless start/stop with press-and-hold switch for smooth operation
VERSATILE BIT SET - Includes 8 high-speed steel bits (0.8-2.2mm) for diverse DIY projects
SLEEK PEN STYLE DESIGN - Ergonomic, comfortable grip for precision micro-drilling
ULTRA QUIET PORTABLE - Whisper-quiet motor and featherweight build for on-the-go use
FAST RECHARGE WITH TYPE C - Modern USB-C charging for quick power-ups and uninterrupted workflow

The wowstick Mini Electric Screwdriver is a rechargeable, cordless 11-in-1 drill kit featuring 8 precision hardened steel bits and a high-speed 420 RPM motor. Its pen-style ergonomic design ensures comfort and control, while the ultra-lightweight aluminum body and whisper-quiet operation make it perfect for detailed DIY tasks like jewelry making, woodwork, and resin crafting. Equipped with fast Type-C charging and a lithium polymer battery, it delivers efficient, portable power for professionals and hobbyists alike.

Specifications

Brand	wowstick
Power Source	Battery Powered
Maximum Rotational Speed	420 RPM
Voltage	3.7 Volts
Amperage	1 Amps
Color	Grey
Included Components	8 Drill Bits, Type-C Charging Cable, Host
Special Feature	Variable Speed
Product Dimensions	9.84"L x 1.57"W x 2.56"H
Material	Aluminum
Number of Speeds	1
Speed	420 RPM
Item Weight	0.19 Kilograms
Maximum Power	1 Watts
Drill Type	Basic Drill
Is Electric	No
Manufacturer	WOWSTICK
Drilling Capacity Metal	0.5 Inches
Part Number	DRILL
Item Weight	6.7 ounces
Item model number	WOWSTICK DRILL
Batteries	1 Lithium Polymer batteries required. (included)
Item Package Quantity	1
Special Features	Variable Speed
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Lithium Polymer

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