4 mil thick

Hole saws are shipped without arbors and pilot drills

1 X 12 LAZER SPD SPADE BIT

Cobalt is extremely heat resistant

with a coverage area of up to 20 square feet per can

7/8 S&D 1/2 RS DRILL 4 mil thick7 8 S&D 1 2 RS DRILL Silver & Deming style drill bits, 118 point. Made from M35 steel with 5% cobalt, Centurys Cobalt drill bits are designed to cut through extremely hard metals, including stainless steel. Polished finish for fast chip removal, keeping the bit cool and reducing wear. Cobalt steel will remain sharper while drilling large diameter holes in ferrous and non ferrous steels and other materials where large diameter holes are required.