Irwin Unibit Assorted L High Speed Steel Step Drill Bit Set 3-Piece

The IRWIN - 10502ZR is a step drill bit set composed of three high speed steel drill bits manufactured for fractional-inch step measurements. It features cutting sizes ranging from 1/8 in to 3/4 in, supporting drilling diameters within the included step sizes (1/8 in through 3/4 in) using the specified step increments. The bits have a speed point tip with a 135-degree point angle and a black oxide finish for machining use. The set is housed in a plastic case for storage and organization.
Key Features:
Includes three step drill bits with overall lengths of 2 1/2 in, 3 3/16 in, and 3 1/4 in.
Covers 17 to 28 hole sizes with step increments of 1/32 inch and 1/16 inch and step thicknesses of 5/32 inch and 3/8 inch.
Shank diameters are 1/4 inch and 3/8 inch with a hex shank shape and three-flat design for secure grip.
Flute length varies between 1 1/2 in and 2 3/16 in with a single flute per bit.
Drill bit sizes included range from 1/8 in through 3/4 in in fractional increments suited for multiple hole sizes.
Measurement system used is fractional inch.
Drill bits have a speed point type and are right-hand cutting.