Multi-step HSS cobalt steel drill bit set, 5 pieces, progressive diameters 2–10 mm, practical case

1. Made of titanium-coated high-speed steel, these hexagonal shank step drill bit sets have high hardness.
2. The step drill bit sets adopt a grooved design, helping the electric drill to grip them more firmly, preventing slippage or dropping during rotation.
3. They are very suitable for cutting holes in a variety of materials, including steel, brass, wood, plastic, etc.
4. Cobalt coating for a smoother, gentler cut; automatically deburrs holes as you drill.
5. Made of high-quality materials, strong and durable, with a long service life.

Specification:

Features:
- This item is brand new
- This set replaces 50 individual drill bits. The two-flute design provides a faster, smoother cut. The 3-sided (TRI-FLAT) shank won't slip in your drill chuck. Cobalt coating for a smoother, cooler cut
- Ti coating to reduce friction and run cooler
- The large drill bit has a 3-sided shank and the small drill bits have a hex shank to prevent slipping in the drill chuck
- Automatically deburrs holes as you drill
- Long-lasting high-speed steel
- Includes a padded aluminum protective case
- Package size: 15 cm x 10.5 cm x 4.2 cm (L x W x H).
Sizes:
#1: 3/16" to 1/2" 6 steps (3/16", 1/4", 5/16", 3/8", 7/16", 1/2")
#2: 1/8" to 1/2" 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: 1/4" to 3/4" 9 steps (1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4")
#4: 1/4" to 1-3/8" 10 steps (1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8")
#5: 3/16" 7/8" 12-step (1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8")
Package includes:
1 x 1/4-1-3/8" step drill bit
1 x 3/16-7/8" step drill bit
1 x 1/4-3/4" step drill bit
1 x 1/8-1/2" step drill bit
1 x 3/16-1/2" step drill bit
1 x aluminum case