High-Speed Steel Step Drill Bits Set - Cobalt Coated Step Drill for Metal, Wood, Plastic - Multi-Size Hole Milling & Core Drilling Kit (Drill Bit & Punch Included) - Perfect for DIY Projects, Home Repairs & Metalworking

Durable to keep new shine for a long time.Feature:1. This is a type HSS steel large step cone drill cobalt bit fixed hole milling cutter.2. It is made of high-quality HSS steel and is plated with titanium to reduce friction and heat.3. Very suitable for cutting holes in various materials, including steel, brass, wood, plastic, etc.specification:Type: core bitMaterail: HSS high-speed steelCoating: CobaltDimensions x total length x shank diameter x shank length3 / 16-1 / 2 x about 57mm x about 6mm x about 24mm1/8-1/2 x about 77mm x about 6mm x about 24mm1/4-3/4 x approximately 73mm x approximately 9mm x approximately 24mm3/16-7/8 x approximately 77mm x approximately 9mm x approximately 24mm1 / 4- 1-3 / 8 x about 76mm x about 9mm x about 24mmDimensions include:3/16-1/2: 3/16'', 1/4'', 5/16'', 3/8'', 7/16'', 1/2''1/8-1/2: 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''1/4-3/4: 1/4'', 5/16'', 3/8'', 7/16'', 1/2'', 9/16'', 5/8'', 11/16 inches, 3/4 inches3/16-7/8: 3/16'', 1/4'', 5/16'', 3/8'', 7/16'', 1/2'', 9/16'', 5/8 ", 11/16 ", 3/4 ", 13/16 ", 7/8 "1/4-1-3/8: 1/4'', 3/8'', 1/2'', 5/8'', 3/4'', 7/8'', 1'', 1-1/8 ", 1-1/4 ", 1-3/8 "

Step drills quickly and smoothly drill holes in steel, aluminum, wood, plastic, etc.

1. This is a type HSS steel large step cone drill cobalt bit fixed hole milling cutter.

2. It is made of high-quality HSS steel and is plated with titanium to reduce friction and heat.

3. Very suitable for cutting holes in various materials, including steel, brass, wood, plastic, etc.

4. Materail HSS high-speed steel