HSS Twist Drill Bits

HSS Step Twist Drill Bits

Material: HSS 4241,4341,M2,M35
Surface:Titanium Coated
Product No.:2133
Package: 3pcs/set
Product description: SCOWELL Designed to start on contact for clean, accurate holes and a reduced likelihood of lock-up on breakthrough,The unique step structure, a drill can drill a variety of sizes of the aperture.You c
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HSS Step Twist Drill Bits

1.Material:High Speed Steel 4241# ,4341#, M2, M35
2.Diameter:
Metric Siz:

Inch Size:

5 steps:3/16''(4.76mm), 1/4''(6.35mm), 5/16''(7.94mm), 3/8''(10.35mm), 7/16''(11.11mm), 1/2''(12.7mm)
8 steps: 1/4''(6.35mm) ,5/16''(7.94mm), 3/8''(10.35mm), 7/16''(11.11mm),1/2''(12.7mm),9/16''(14.28mm), 5/8''(15.88mm), 11/16''(17.46mm), 3/4''(19.05mm)
12 steps: 1/8''(3.18mm), 5/32''(3.97mm), 3/16''(4.76mm), 7/32'',(5.56mm)1/4''(,9/32''(7.14mm), 5/16''(7.94mm), 11/32''(8.73mm),3/8''(9.53mm),13/32''(10.32mm),7/16''(11.11mm),15/32''(11.91mm),1/2''(12.7mm)