Features: 5pcs Set HSS Step Cone Drill Bits Titanium Coated(1/4- 1 3/8”, 3/16- 7/8”, 1/4- 3/4”,1/8- 1/2” and 3/16- 1/2”) Step Cone Drill Bits design for precision drilling different size holes from 1/8” up to 1 3/8” in diameter,optimum speed and accuracy. Heat Treated and Highly Polished, Cobalt Coated to Reduce Friction and Heat. Perfectly Round Holes in Steel, Brass, Plastic, Wood, Copper, fibreglass, PVC, thin metals and aluminium. Automatically deburrs holes as you drill. Specifications: Material: High Speed Steel with durable Cobalt Coat Color: As shown on photo Quantity: 5pcs/set Size(Total Length*Shank Diameter): 1/4- 1-3/8 inch: approx. 70x8mm 3/16- 7/8 inch: approx. 70x8mm 1/4- 3/4 inch: approx. 66x8mm 1/8- 1/2 inch: approx. 70x6mm 3/16- 1/2 inch: approx. 55x6mm The Five cutters Come in the following sizes: 1/4- 1-3/8 (inch): 10 Steps (1/4”, 3/8”, 1/2”, 5/8”, 3/4”, 7/8”, 1”, 1 1/8”, 1 1/4”, 1 3/8”) 3/16- 7/8 (inch): 12 Steps (3/16”, 1/4”, 5/16”, 3/8”, 7/16”, 1/2”, 9/16”, 5/8”, 11/16”, 3/4”, 13/16”, 7/8”) 1/4- 3/4 (inch): 9 Steps (1/4”, 5/16”, 3/8”, 7/16”, 1/2”, 9/16”, 5/8”, 11/16”, 3/4”) 1/8- 1/2 (inch): 13 Steps (1/8”, 5/32”, 3/16”, 7/32”, 1/4”, 9/32”, 5/16”, 11/32”, 3/8”, 13/32”, 7/16”, 15/32”, 1/2”) 3/16- 1/2(inch): 6 Steps (3/16”, 1/4”, 5/16”, 3/8”, 7/16”, 1/2”) Packaged included: 5 x Drill Bits Payment Terms Shipping Terms inkfrog terapeak