1.Drill multiple size holes with one bit.Popular in the professional construction market.
2.Greater control,rounder holes(single-fluted cutting edge)
3.Up to different holes sizes
4.Long life (due to industrial grade high speed steel)
5.Material:HSS M42/M35/M2
6.

A. 3/16" to 1/2" Six Step Bit (3/16", 1/4", 5/16", 3/8",7/16", 1/2")

B. 1/4" to 3/4" Nine Step Bit (1/4", 5/16", 3/8", 7/16",1/2", 9/16",5/8",11/16",3/4")

C. 1/8" to 1/2" Thirteen Step Bit (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").......

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