3/5Pcs Hss Cobalt Multiple Hole 50 Sizes Step Drill Bit Set Tools

Characterization:

Material: High Speed Steel with Cobalt Coated.

This set replaces 50 individual drill sets.

Made by Long life high speed steel.

Self starting no need for a pilot hole.

Cobalt coated to reduce friction and run cooler.

Automatically deburrs holes as you drill.

Includes protective padded aluminum case.

1/4 to 1 3/8 Drill Bit: 10 Steps (1/4, 3/8 amp;amp;rdquo;, 1/2, 5/8, 3/4, 7/8, 1, 1 1/8, 1 1/4, 1 3/8).

3/16 to 7/8 Drill Bit: 12 Steps (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 to 3/4 Drill Bit: 9 Steps (1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4).

1/8 to 1/2 Drill Bit: 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).

3/16 to 1/2 Drill Bit: 6 Steps (3/16, 1/4, 5/16, 3/8, 7/16, 1/2).

In the package: 3x Drill Bits ,1 x Soft Case，

or 5 x Drill Bits ,1 x Aluminum Case