Description: -100% brand new and high quality -Drill 28 Hole Sizes -Quality Step Drill Bits with organizer bag -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: -5 Step Bit from 12mm to 4mm -9 Step Bit from 12mm to 3mm -13 Step Bit from 20mm to 4mm -Weight :0.11kg Included in this package: -3X Step Drill Bits -1X Automatic Center Punch - 1X Case