Irwin Unibit 4M USA 10502853 HSS Step Drill Bit 4-22mm (10 Holes) For Sheet Metal

DescriptionNumber of hole sizes: 10. Hole diameters: 4, 6, 8, 10, 12, 14, 16, 18, 20 and 12mm.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.

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