"N" x 6" HSS Aircraft Extension Drill Bit SDS Plus+ Quad-Tip Hammer Drills These drills have a 5-1/2"

These drills have a 5-1/2" drilling depth and are sold individually

and productivity

and bronze

SDS-Plus Carbide Tipped Drill Bits are designed for drilling stone or concrete

Threaded countersink cutters can be used in adjustable or micro-stop countersinking tools with a 1/4-28 threaded drive

"N" x 6" HSS Aircraft Extension Drill Bit SDS Plus+ Quad-Tip Hammer Drills These drills have a 5-1/2"Description A versatile drill for production, maintenance, or portable drilling jobs. Ideal for extended reach. 135 split point tip for fast, accurate drilling. Works on many materials. Black oxide surface resists abrasion and improves chip flow. The round shank fits various tool holding systems. Sold in packs of 12