Grace USA - Bench Block Holder for RS-7 Steel Roll Spring Punch Set - Gunsmithing - Steel Roll Spring Punch Set Holders - RS7 - Gunsmith Tools & Accessories Each Bench Blockis 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 Handcrafted in the USA