Product Description5Pcs Hss Stepped Titanium Tapered Hole Cutter KitThis Is The New Tapered Hole Cutter. Forest Hss Steel Titanium Drill Bit, Made Of High Quality Hss Steel, Coated With Titanium To Reduce Friction And Heat.It Is Ideal For Drilling Holes In Various Materials, Including Steel , Brass, Wood, Plastic, Etc.MaterialThe Drill Bit Hss Floors Are Manufactured In Stainless Steel High Speed And Titanium Coated To Reduce Friction And Heat And Increase Life. Three Sides Prevents The Bit From Slipping;The Blade Features A Three-Sided Design; Double Edge For Faster, More Frequent Cutting.Note:Check The Concentricity Of The Spindle And The Collet And The Clamping Force Of The Collet.Since The Concentricity; May Cause The Tip To Break Off And Make The Hole Too Large. Your Different Needs.Specific Size:3/16 To 1/2 6 Levels (3/16, 1/4, 5/16, 3/ 8, 7/16, 1/2) 1/8 To 1/2 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) 1/4 To 3/4 9 Levels (1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4 ) 1/4 To 1-3/8 10 Levels (1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/8, 1 -1/4, 1-3/8) 3/16 To 7/8 12 Levels (1/4, 5/16, 3/8, 7/16, 1/2 , 9/16, 5/8, 11/16, 3/4, 13/16, 7/8)Wide Applications:The Sharpness; And Titanium Coating Make It Easy To Cut Most Steel Sheets, Aluminum Sheets, Copper And Plastic And Wood Panels And Many Other Types Of Sheet Metal Automatic Center PunchThe Center Punch Provides An Automatic Spring Strike To Your Fingertips. High Impact Thanks To The Adjustment Of The Cap; Its Brass Body Has A Deeply Knurled Surface For Slip-Free Control; And The Tip With The Carbide Tip Makes The Center Punch 10 Times Stronger Than Normal, Aluminum Protective Casing To Make The Tips Difficult To Break. Blunt