Grace USA 21 Piece Steel Punch Set contains their 7-Piece Short Roll Spring Punch Set, 7-Piece Roll Spring Punch Set, and 7-Piece Punch Set. All punches are made of High Carbon Molybendenum Tool Steel and properly heat treated and hardened the entire length with tempered striking end. Grace USA Bench Block Tool Holders are made out of 60 durometer Neoprene rubber. Neoprene rubber is a general purpose compound that offers excellent oil resistance and chemical stability, as well as vibration dampening.Neoprene will remain stable over a wide temperature range.
Big Book Catalog, Issue:69, Page:430