[ Package Includes ] : 6 Sets 1/2" + 6 Sets 3/8" Impact Wrench Retainer Rings/Friction Rings & O-ring [ Compatible with ]: 1/2" Standard Type Impact Wrench, Meet-OEM Standard; 3/8" Standard Type Impact Wrench, Meet-OEM Standard [ Suitable for ]: 1/2" and 3/8" Square Drive Electric Wrench and Pneumatic Wrench are Suitable for This Kit [ Specifications ]: Size: about 1/2 inch and 3/8 inch; Color: Black; Material: Carbon Steel, Rubber [ Install & Use ]: How to Install New O-Ring: Place Retaining Ring Into Install Tool Recess, Insert Anvil Into Retaining Ring at a 45° Push and Bring the Anvil Perpendicular

[ Package Includes ] : 

6 Sets 1/2" + 6 Sets 3/8" Impact Wrench Retainer Rings/Friction Rings & O-ring

[ Compatible with ]: 

1/2" Standard Type Impact Wrench, Meet-OEM Standard; 

3/8" Standard Type Impact Wrench, Meet-OEM Standard

[ Suitable for ]: 

1/2" and 3/8" Square Drive Electric Wrench and Pneumatic Wrench are Suitable for This Kit

[ Specifications ]: 

Size: about 1/2 inch and 3/8 inch; 

Color:Black; 

Material: Carbon Steel

[ Anvil Retaining Ring Install Instruction ]：

Step 1: Install new o-ring to your wrench.

Step 2: Put retaining ring into install tool recess.

Step 3: Insert the anvil into the retaining ring with 45°thrust.

Step 4: Push and bring the anvil perpendicular.

[ Note ]：

Specifically designed to fit type 1/2" and 3/8" cordless impact wrench.