Installation is simple, place the retaining ring into the tool slot; insert the anvil into the retaining ring at a 45-degree angle and keep the anvil body vertical. Replacing the Retaining Ring and O-ring of the Impact Wrench Socket Ring Wrench Set 1/2" 3/8" Impact Wrench Retaining Socket Rings & With Ring Wrench O Ring For 3/8 Impact Retaining Ring 10 Sets) 1/2 Ipact Retaining Ring Fits ilwaukee 1/2 Ipact Friction 1/2" & 3/8" Impact Wrench Socket Retaining Ring C Clip with O-Ring - 5 sets of each size. 3 reviews. SKU: TGR0512 TGR0538-KIT. Price $ 34.99 mpact Wrench Detent Pn Vs Hog Rng at Olga Patrck blog The o-ring is made of high-quality rubber, which is not easy to break; the fixed ring is made of carbon steel, which is strong and wear-resistant