Woodtek 160298, 4-pack, Clamps And Vises, Bar & Pipe Clamps, 36" One Hand Bar Clamp These clamps are like an extra hand for positioning or fastening. Specifications: Throat Depth=2-1/2 in, Max Opening=36 in, Length=36 in Specifications: Width=9 in, Height=1 in, Jaw Width=1-3/8 in Specifications: Jaw Height=3-3/8 in