1. Chrome vanadium steel socket with high strength and large torque. Polished-Chrome Plated for corrosion resistance.
2. Rubber retaining ring insert secures and protects the spark plug.
3. Deep well thin wall design is suitable for most cars, trucks, lawn mowers, motorcycles and many other applications.
4. It has a radius corner design, causing the socket to grasp the sturdy wall of the fastener instead of the corners, thereby reducing the wear of the fastener.
5. 1/4" hex shank impact driver socket fit all quick change chucks as well as standard drill chucks, quick connect, work on quick change drill chuck, standard drill chuck, hand screwdriver, electric screwdriver, change your hand bit socket to a drive socket.

Specification:
Socket -
Size: 21mm
Drive Size: 3/8-inch
Total Length: 63mm / 2.5-inch
Bit Material: S2 Alloy Steel
Socket Material: Chrome Vanadium Steel (CR-V)
Finish: Polished, Chrome Plated

Socket Adapter -
Square Drive: 3/8-inch
Hex Shank: 1/4-inch
Total Length: 66mm / 2.6-inch
Finish: Chrome Plated

Package Content:
1 x Spark Plug Socket
1 x Hex Shank Adapter