ITEM NAME:New 3Pcs Steel Titanium Coated Step Drill Bit Quick-change 1/4" Hex Shank Hot 100% brand new and high quality Drill 28 Hole Sizes This compact Set Replaces 28 Individual Drill Bits Automatically Deburrs Holes as you Drill Two-flute Design Gives You Faster, Smoother Cutting Titanium Nitride Coating for Cooler Running Quick-change 1/4" Hex Shank High Speed Steel for Long Life These Step Drill Bits are ideal for variety of materials from metal, plastic, fiberglass to wood They also help to enlarge existing holes The two flute design tips made the penetration faster without chipping Specification: Sizes of the 3 Step Drill Bits: 6 Step Bit from 3/16" to 1/2" 9 Step Bit from 1/4" to 3/4" 13 Step Bit from 1/8" to 1/2" Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, Thank you. 3pcs Drill Bits.3pcs Drill Bits. Quick-change 1/4" Hex Shank. Drill 28 Hole Sizes. Titanium Nitride Coating for Cooler Running. This compact Set Replaces 28 Individual Drill Bits. Sizes of the 3 Step Drill Bits Automatically Deburrs Holes as you Drill.