Gardner Bender PPR-1600 Rubber Insulated Steel Clamp, Secures Wire & Cable in Industrial/Auto / Marine Applications, 1 in, 1 Hole, 2 Pk, Black The product is 1" Rubb Insult Clamp Easy to use The product is manufactured in China Rubber Insulated Clamps Superior quality at an affordable price Corrosive-resistant plated steel clamp