Enlarge And Align Existing Holes Through Steel, Stainless Steel, Tough Alloys

Sizes 5/16 Through 1 In Have 1/2 In Flatted Shanks For Use In Power Drills And Drill Presses With 1/2 In Chuck Capacity

Sizes 1-1/8 to 1-1/2 In Have 3/4 In Shanks

Left Hand Helix, Right Hand Cut Sheers Chips Away From Operator

Safety Collar Stop Prevents Over-Penetration And Enhances Operator Stability

Ideal For Maintenance Work, Steel Erection/Fabrication, Truck/Trailer Repair

Surface Treated High Speed Steel