•Design Type: XL (Extra Long) HSS Step Drill Bit with 10mm steps •Coating: TiAlN (Titanium Aluminum Nitride) for maximum heat and wear resistance. •Flute Design: Helicoidal (Spiral) for optimal chip evacuation and smoother cutting. •Drilling Range: Creates holes with diameters from 8 mm to 22 mm. •Maximum Drilling Depth (Cutting Length): 95 mm (The "XL" feature ensures this longer reach). •Shank Design: Tri-Flat Shank (10 mm diameter) to prevent slippage in the drill chuck. •Total Length: 120 mm •Application Focus: High-performance drilling of metals, including high-strength sheet steel and stainless steel. •Packaging: Supplied in a Blister Box.