The DIAMOND 1/4" Headed and Wire Loop Drive Pins are used with the Hammer Drive Tool in telephone and CATV drop installations to secure clamps, wire loops, and other devices to masonry and concrete surfaces. Specifications (Drive Pins) · Made of high carbon, hardened steel · Zinc Plated to resist corrosion · REA Accepted · Manufactured in USA Specifications (Hammer Drive Tool) · Made of high quality, heat treated steel · Black Oxide finish to resist corrosion · Tapered Barrel to retain drive pins · Lightweight with a contoured vinyl grip for easy handling · Protective guard between striking surface and grip · REA accepted · Manufactured in USA