Irwin - #6, #8 and #10 Countersink Set 4 pc

Replacement tapered drill bits with widened flutes for drilling fast, clean pilot holes. Adjustable 4-cutter counterbore cuts and clears chips quicker for fast, smooth countersink or counterbore drilling. Attaches and adjusts with 2 hex screws. Set includes 1 each: #6 Model No. 1882787 (SKU 301654), #8 Model No. 1882788 (SKU 301659), #10 Model No. 1882789 (SKU 301661), and 1 stop collar.