The SHOK-BUFF® prevents the slide from battering the frame during recoil by sandwiching a 1/10" thick poly fiber buffer between the slide and frame contact areas. When you are shooting high performance loads in your 1911 style pistol, you want the extra protection that the original SHOK-BUFF® provides. Prevents the Slide from Battering the Frame During Recoil Optimum Balance Between Shock Absorption and Longevity Easily Replaceable Absorbs Up to 1,000 Rounds of Repeated Firings Slides Over the Recoil Spring Guide Between Guide and Spring Original Injection Molded SHOK-BUFF® Royal Blue and Bears the SHOK-BUFF® Name The SHOK-BUFF® prevents the slide from battering the frame during recoil by sandwiching a 1/10" thick poly fiber buffer between the slide and frame contact areas. When you are shooting high performance loads in your 1911 style pistol, you want the extra protection that the original SHOK-BUFF® provides. One "Imitations" brand on the market claims they are better because their buffer lasts a little longer. The object of the frame to slide buffer is to protect the pistol from wear, if the buffer is not soft enough to take the damage instead of the pistol what have you accomplished? We feel the original SHOK-BUFF® is the optimum balance between shock absorption and longevity. Easily replaceable after absorbing up to 1,000 rounds of repeated firings, the SHOK-BUFF® slides over the recoil spring guide between guide and spring. Why take a chance on an inferior die stamped copy when you can have the original injection molded SHOK-BUFF®? With over 30 years of competition and street proven experience and hundreds of thousands sold, the original SHOK-BUFF® is still the best. Don't be fooled by imitation products, current production Wilson SHOK-BUFF® buffers are royal blue and bear the SHOK-BUFF® name. NOTE: SHOK-BUFF® buffers are recommended for full-size (5" barrel) 1911's only. Due to space constraints, we do not recommend their use in compact (less than 5" barrel) 1911's. Installation Instructions