Description: High-Speed Steel: Made from High-Speed Steel 4241 Cobalt high-speed steel along with the titanium coating ensures extreme durability, and will stay new and shiny for years to come. and easy cutting/drilling through steel sheets, aluminium sheets, wood board, plastic board etc. 50 Size in 5 Bits: Set includes five standard SAE step drill bits with a two-flute design for faster, that can replace 50 individual drill bits, you can process 50 different kinds of diameter holes with the five pieces. Set includes: Drill Bit 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. Drill Bit 2: (3/8". 12 Steps): 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8. Drill Bit 3: (3/8". 9 Steps): 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4. Drill Bit 4: (1/4". 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. Drill Bit 5: (1/4". 6 Steps): 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 Easy To Use: Double cutting blades and X-type openings design ensure a faster, smoother cutting and a tri-flat shank for a sure grip. drill tip provides fast and smooth drills on steel sheets, aluminium sheets, wood board, plastic board etc. Storage Case: The bits come supplied in an organized aluminium case for secure storage and easy carrying. Note: Actual product color may vary from the colour you see on your screen. Specification: Type: Drill bit set Size: 15.2 * 11 * 4cm Material: HSS + Titanium coating Color: Brown + Black Item Weight: 440gm Features: High quality High-impact 50 sizes in 5 drill bits Two-flute design Wide applications Easy to store Durable Sharp and precise Fast and smooth drills Easy to use Package Content: 1x Storage box 5x Drill bits