Diablo, 4-1/8'', high performance hole saw, delivers faster cutting performance & increased productivity, hole saw design provides ultimate cutting depth to bore deeper holes in 1 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.