General description Sealey Double Spiral HSS 4341 Step Drill Bit 4-30mm is designed for efficient and clog-free precision drilling. This high-speed drill bit features double spiral flutes that facilitate effective swarf clearance, making it ideal for creating holes in various materials. Technical specifications Material: High-speed HSS 4341 Hole Sizes: 4-30mm in 2mm increments Model No.: AK4748 EAN: 5054511002645 Storage Supplied in a plastic storage case for easy organization and transport. Other information