Compatibility: No need for center punch pre positioning, direct hole opening to avoid broken blades; compatible with hand and electric drills, supporting 250-400 rpm water cooling operating Features - Stonego Tools 5 piece step drill bits set replaces 50 individual drill bits which saves you a lot of trouble and space. - Two-fluted design provides smoother and faster cutting. - Cobalt steel with titanium coating ensures the bits have exceptional durability and will stay sharp for many years. - The bits are ideal for cutting holes in plastic board, aluminum sheets, wood board... High Hardness Material: This drill bit adopts bearing steel substrate. BOSSMAN BSDS 5PCS Step Drill Bit Set W/ Carry Bag Kuala Lumpur (KL Metal Drilling Step Bits Step Drill Bit Set 5PCS Titanium HSS For Metal Wood Plastic Cone Drill Bits 5pcs Suitable for Opening Holes: A single drill bit integrates 10 level stepped aperture (covering Φ4-32 mm), one drill replaces the traditional drill bit set, avoiding frequent tool changes, doubling efficiency, especially suitable for opening holes and pipe expansion Custom High Speed Steel Step Drill - General Cutting Tools Double Edge Design: 118° split point tip with double edge structure, automatic correction of drilling position, greatly reducing the deviation rate, chip discharge, and burr free precision drilling It is wear resistant, which can easily cope with thin wood, thin aluminum, thin plastic and other materials
