What is the outside diameter of the 21mm socket? With and without the protecting sleeve if possible...

I am not sure on the actual size. However it is the same diameter as a tradition socket. It will but ohm type rims but if you have aftermarket you may have issues.

Are these Chrome Moly, Chrome Vanadium, or something else?

per the Gear Wrench Website "GEARWRENCH offers a wide range of impact sockets in open stock and sets that are designed to deliver the performance and strength that the professional users require. They are made from chrome molybdenum alloy steel for exceptional strength and durability. Sockets have a manganese phosphate coating to resist corrosion. The sockets also feature highly visible laser etched markings and a secondary size hard stamping. The sockets feature off-corner loading to reduce fastener rounding. FEATURES High-strength impact socket for up to 3x longer life than regular thin wall impact sockets Thin wall socket design for access in confined spaces Protective outer sheath prevents damage to wheels"

Do these sockets have any coating to protect against corrosion?

They have the usual kosmoline film however once you use them and clean then you best use them. The coat is for storage before purchase. Ifor you will use them rarely keep away from moist places.

Do these sockets protect the lug nuts from getting scratched?

Only the tops. Also the area around the lug nut if it's close clearance around the nut by the wheel itself.

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GEARWRENCH 3 Piece 1/2" Drive High-Strength Wheel Protector Impact Metric Socket Set | 84946

Product ID: 289443293

Details

Brand
GEARWRENCH
Drive system
1/2" drive
Finish type
Manganese
Material
Metal
Number of pieces
3

⚙️3x longer life impact sockets

🛠️thin wall design for tight spaces

🛡️protective sheath guards wheels

€ 95.87

Duties & taxes included

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Protect your wheels, power your projects — the pro’s choice for precision and durability!

ACCESS EVERY TIGHT SPOT - Slim, thin wall design lets you work effortlessly in confined, hard-to-reach areas.
BUILT TO LAST 3 X LONGER - High-strength impact sockets engineered for durability that outperforms standard thin wall sets.
ULTIMATE WHEEL PROTECTION - Outer sheath and inserts shield your rims and lug nuts from scratches and damage.
CORROSION RESISTANT FINISH - Manganese phosphate coating ensures your tools stay rust-free and reliable over time.
TRUSTED BY PROS LOVED BY ENTHUSIASTS - GearWrench’s patented innovation and 4.7-star rating make this set a must-have for serious automotive work.

The GEARWRENCH 3 Piece 1/2" Drive High-Strength Wheel Protector Impact Metric Socket Set (sizes 17mm, 19mm, 21mm) features a patented thin wall design with a protective outer sheath and manganese phosphate coating, delivering 3x longer life and superior protection for wheels and lug nuts. Ideal for professionals and enthusiasts working in tight spaces, this set combines durability, corrosion resistance, and trusted GearWrench innovation.

Specifications

ASIN	B00CT9LQSK
ASIN	B00CT9LQSK
Bit Compatibilities	Hex-bolts, Hex-nuts, Lug Nuts
Bit Set Composition	Bit Set
Brand Name	GEARWRENCH
Customer Reviews	4.7 4.7 out of 5 stars (949)
Customer reviews	4.7 4.7 out of 5 stars (949)
Date First Available	21 September 2023
Department	Unisex Adult
Drive Bit Application	automotive
Drive Bit Shank Style	1/2" Drive
Drive System	1/2" drive
Finish Types	Manganese Phosphate
Global Trade Identification Number	00099575849466
Is Discontinued By Manufacturer	No
Item Weight	0.79 Pounds
Item model number	84946
Manufacturer	GEARWRENCH
Manufacturer	GEARWRENCH
Manufacturer Part Number	84946
Material Type	Metal
Model Number	84946
Number of Items	1
Number of Pieces	3
Product Dimensions	16.19 x 12.35 x 5.08 cm; 358.34 g
Set Name	3 Piece 1/2" Drive High-Strength Wheel Protector Impact Metric Socket Set
UPC	099575849466
Unit Count	1 Count

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