Most Durable Carbide Hole Saw;Longest Life in General Purpose and Extreme Materials;Faster cuts with 3 TPI design;Deep gullets clear material fast;All-Access Slots for fastest plug removal;Cuts stainless steel, fastener embedded wood, cement board, fiberglass, plaster, asphalt shingles and more;For the toughest applications where bi-metal cannot cut;Made in USA;1-5/8" Cutting Depth