Gripping Textures  D/C Diamond Coated   Industrial diamonds are used to create a sandpaper-like gripping texture. Paper is abrasive and wears down many gripping textures. A Diamond Coated Gripper is hard enough to withstand the wear by paper and outlasts all other metal-sprayed gripping textures.  M/G Machine Grooved Distinct diamond-shaped, pyramid and line-grooved points are machine cleaned. Each pad is made from high quality carbon alloy tool steel and heat-treated to a hardness of 58/60 Rc. (Rockwell Hardness) for long wear. U/C Urethane Coating Urethane is poured onto the gripped pad and cured to a Shore Hardness of 88A to prevent the urethane coating from peeling off the steel pad or finger. The urethane is the machined to a finished tolerance. The average urethane coating will be about .018" thick.