Description: Constructed of high quality HSS steel with Titanium coated, Titanium coated to reduce friction and heat. Sizes of the 3 Step Drill Bits:5 Step Bit from 4 to 12;9 Step Bit from 4 to 20;15 Step Bit from 4 to 32. High Speed Steel for Long Life.These Step Drill Bits are perfect for variety of materials from metal, plastic, fiberglass to wood. Two-flute Design Gives You Faster, Smoother Cutting,The two flute design tips made the penetration faster without chipping. Automatically Deburrs Holes as you Drill.Set comes with 3 different bits. Specification: Material: High Speed Steel (HSS) Size: 4-32mm?4-20mm? 4-12mm Color: As picture show Package Includes: 3 Piece Triangle Drill Bits Hole Cutter Bit Set Note: Since the size above is measured by hand, the size of the actual item you received could be slightly different from the size above
