Set of 5pcs Drills: 1/4-1-3/8, 3/16-7/18, 1/4-3/4, 1/8-1/12, 3/16-1/2, step drills with 5 sizes to meet your different drilling demands.
High Speed Steel Material: features of high quality, high hardness, and good durability, which really an essential hardware tool for drilling, cutting, and woodworking using.
Surface Blue Coating: step drill bits has the advantages of good abrasion resistance, good heat resistance, and rust resistant.
Professional: spiral groove can make a precise, smooth, clean and perfectly round hole.
Applications: suitable for punch holes through sheet metal, steel plate, aluminum plate, brass or wood.
Size: 1/4-1-3/8, 3/16-7/18, 1/4-3/4, 1/8-1/12, 3/16-1/2
Measurement System: Imperial
Surface Treatment: Blue coating
Shank Type: Triangular Shank
Flute Type: Spiral
Package Weight: 454g / 16.03oz
Package Size: 15 * 11.5 * 4.2cm / 5.91 * 4.53 * 1.65in
5 * Step Drill
1 * Storage Box