Compatible with Impact Wrench, Air Wrench Electric Wrench/Pneumatic Wrench are Suitable for This Kit Friction Ring Replacement Specifically Designed Use on for Type 3/8inch Cordless Impact Wrench (10+10 Sets) 3/8inch and 1/2inch Impact Retaining Friction Ring Clip with O-Ring Easy to Use: Place Retaining Ring Into Install Tool Recess, Insert Anvil Into Retaining Ring at a 45 Push and Bring the Anvil Perpendicular Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Photo Color Material:Rubber+Iron Package Contents: 10Set x 1/2inch Impact Retaining Friction Ring Clip 10Set x 3/8inch Impact Retaining Friction Ring Clip 1set x O-Ring with 1 Anvil Tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.