Bi-metal, 32 TPI, U-shank, jigsaw blade, greater precision, super sharp to cut fast without deflection, smoother finish, ground to precision, sharpness for straighter cuts and a smoother finish, ideal for woodworking, designed for optimal performance Jig saw blades2 countUse on metalCuts without deflectionSmooth finishShatter resistantU shankBi metal32 TPI3-5/8 in.