5 Pieces 7/8 Inch Hex Shank HSS Twist Cobalt Drill Bits

Product Name

5 Pieces HSS CO Step Drill Bit Hex Shank Cobalt Drill Bit Set for Hard Metal Drilling

3/16-1/2''(3/16,1/4,5/16,3/8,7/16,1/2)

1/8"-1/2''(1/8,5/32.7/32.1/4,9/32,5/16,11/32,3/8,13/32,7/16,15/32,1/2)

1/4-3/4''(1/4,5/16,3/8,7/16,1/2,9/16,5/8,11/16,3/4)

3/16-7/8''(3/16,1/4,5/16,3/8,7/16,1/2,9/16,5/8, 11/16,3/4,13/16,7/8)

1/4-1-3/8''(1/4,3/8,1/2,5/8,3/4,7/8,1,1-1/8,1-1/4,1-3/8)

Triangle Shank

M35 Cobalt Steel

Metal, Aluminum, Wood drilling

• Premium M35 6% Cobalt Steel ,66-69 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
• Grinding the Cutting Edge Three Times,with the High HRC and Heat Resistance of the Material,Desigh for Cutting through Stainless steel , Iron plate, Aluminum,Ducts,Wood,PVC and Plastic.
• This Cobalt Step Drill Bit is Typically Capable of Running Two to Three Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.