Dual-Size Fit: Designed for standard-type impact wrenches, compatible with 3/8inch and 1/2inch square drive electric/pneumatic tools. Perfectly secures impact sleeves for versatile applications. Ideal for DIYers and professionals needing reliable, long-term solutions. Quick Installation: Features a dual-hole anvil install tool for effortless clip replacement. Simply insert the retainer ring into the recess, push the anvil at 45°, then align vertically-saves time and reduces downtime! Scenario Design: From auto repair shops to home garages, quickly fix loose impact sleeves and maintain tool stability. Focus on your work, not tool malfunctions! Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Color: As Shown Material: Metal Package Contents: 10 sets x 3/8inch clips & O-rings 10 sets x 1/2inch clips & O-rings 1 x 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.