5/16 X 12 HEAVY DUTY HAMMER DRILL

Roto-Percussion Masonry Drill Bit, 5/16″ Diameter, 12″ Overall Length, 10-1/2″ Drilling Depth, 1/4″ Shank, Carbide-Tipped, Straight Shank, For 3 Jaw Drill Chucks, 6 per Pack