Diablo, 3-1/2'' x 2-3/8'', hole saw, high performance delivers faster cutting performance & increased productivity, design provides ultimate cutting depth to bore deeper holes in single pass, variable tooth design for faster cuts with less vibration & tool free plug ejection for fast material removal, snap lock offers quick & easy change system with no down time, 1 snap lock mandrel fits all diablo hole saws, from 5/8" to 6" diameter, for use with wood, metal, mandrel & pilot bit sold separately.