3pcs Steel Large Step Cone mini drill Titanium Metal Bit cut Tools Set Hole

3pcs HSS step drill Steel Large Step Cone mini drill Titanium Metal Bit cut Tools Set Hole Cutter 1/4 Hex Shank Features: Drill 28 Hole Sizes This compact Set Replaces 28 Individual Drill Bits Two-flute Design Gives You Faster Smoother Cutting Quick-change 1/4 Hex Shank Specifications: 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 New Titanium Coated Step Drill Bit that covers 28 sizes 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 Included: 1X 3pc Quick-change Hex Shank larger Titanium Coated Step Drill Bit Set 3-12/4-12/4-20 mm