Irwin 10502855 5 28.3mm Step Drill Bit (10 Hole)

ManoMano

Irwin Step Drill Bit. Number of hole sizes: 10. Hole diameters: 5, 7.5, 10, 12.5, 15.2, 18.6, 20.4, 22.5, 25.5 and 28.3mm. The Irwin Step Drill Bits are designed for precise drilling in thin materials and have a single flute for maximum drilling control into sheet metal. Their unique flute design ensures perfect round holes in sheet metal. A fluted shank also prevents the drill bit from slipping in the chuck, along with a self centring point that will not walk and eliminates centre punching. Made from industrial grade M7 high-speed steel.

Zoro Tools

The Irwin Step Drill Bits are designed for precise drilling in thin materials and have a single flute for maximum drilling control into sheet metal. Their unique flute design ensures perfect round holes in sheet metal. A fluted shank also prevents the drill bit from slipping in the chuck, along with a self centring point that will not walk and eliminates centre punching. Made from industrial grade M7 high-speed steel.

Amazon

Single flute for maximum drilling control Flattened shank prevents the drill bit from slipping in the chuck Self-centring point eliminates centre punching Made from industrial grade M7 high-speed steel For drilling sheet metal IRWIN, 133 years of ingenuity and high quality, Weight: 0.31 pounds, Manufacturer: Stanley Black & Decker