200mm Holesaw Saw M42 HSS Hole for Aluminium Iron Wood

How to use: open iron as 5 mm, open first about 1 mm deep and then position the drill along the cut joint through a hole that is pierced. Please note: hole saw cutter before use, make sure to be sensible, selection, control, speedometer and continuously added to the cooling fluid to avoid edge cracks. Open and close to minimize speed. Wide use: widely used in conjunction with various holes on the bench. Suitable for cast iron board aluminium board, PVC, wood-free steel plasterboard, soft wood, OSB boards, plywood, chipboard, etc. PREMIUM MATERIAL: This item is made of premium material, high hardness and high durability, sturdy in use and can be used for a long time. Good quality: this product is made of high-quality M42 high-speed steel, the thread diameter is 15 mm, the blade diameter is 6 mm.