Description:
Titanium Coated for longer life,Tri-flat shank for sure grip.New Spiral Titanium Coated Step Drill Bit that covers 10 sizes. This Step Drill Bit is ideal for variety of materials from metal, plastic, fiberglass to wood. They also help to enlarge existing holes.
Laser-engraved reference marks on each bit offer superb convenience and accuracy, ideal for drilling large and small-diameter holes in metal and plastic. For high-efficient drilling, thickness of sheet metal shall be less than that of each step.

Specifications:
10 hole bit sizes:1/4\", 3/8\", 1/2\", 5/8\", 3/4\", 7/8\", 1\", 1-1/8\", 1-1/4\", 1-3/8\"
With 1/8 inch increments
3/8 inch Shank
Heat Treated HSS with Titanium Nitride Coating
Spiral Flute Design made the penetration faster without chipping

Compatible with Electric Drill:
Compatible with 1/4, 3/8, 1/2 electric drills or bench drills, but only work for sheet metal, aluminum or plastic.

Package Included:
1 x 10 Step Cone Drill 1/4\" to 1-3/8\"