Stepped drill bit, 5PCS Titanium Drill Bit Set with Automatic Center Punch, HSS and Titanium Coating with Aluminum Housing, Double Cutting Blade (50 Sizes)

SPIRAL GROOVE AND TITANIUM COATING --- The spiral groove drill bit cuts more smoothly than a straight groove; the drill bit is sharp and can easily drill perfect holes in sheet metal; the titanium coating can reduce friction.

CENTER SELF-PUNCHING ENGINEER --- The thermowell head is made of tungsten carbide and its impact resistance is 10 times greater than that of ordinary center punches.

LASTER MARKING AND X-TYPE OPENINGS Laser marking, clearer dimensions; the X-type opening design can facilitate the removal of cutting debris during drilling to keep the drill bit clean.

DOUBLE-CUTTING BLADE AND ALUMINUM HOUSING --- The double-cutting blade allows for faster and smoother cutting; An aluminum alloy case can protect the drill bit. LONG LIFESPAN AND SERVICE --- Alloy steel, impact resistant, extends the life of the center punch. 1.5 times faster. The spiral groove design makes cutting smoother and easier; the added cobalt reduces friction and lasts longer than those without cobalt bits. Automatic center punch. The center punch consists of an alloy steel cutting head with a lifespan ten times longer than ordinary drill bits. One is used as a set of 10.

High Quality

The step drill bits adopt titanium-coated high-speed steel for oxidation resistance and extended service life.

Wide Applications

The sharpness and titanium coating allow for easy cutting of most sheet metal, plastics, and other materials.

Features:

# 1: 3/16-1/2 (3/16, 1/4, 5/16, 3/8, 7/16, 1/2), 6 steps

# 2: 1/8-1/2 (1/8, 5/32, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/16, 15/ 32, 1/2 mm), 13 steps

# 3: 1/4-3/4 (1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4), 9 steps

# 4: 3/16-7/8 (3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8), 12 steps

Package includes:

5-step drill bit set

1 x automatic center punch

1 x aluminum case