3.94inch Hole Saw, LAIWEI 100mm Hole Cutter with A2 Heavy Duty Mandrel, 4341 Drill Bit,Cutting depth 38mm,For drilling holes in wood, aluminium profiles, PVC and metal pipes (3-15/16″)

inch Hole Saw LAIWEI 100mm Hole Cutter is a high-quality construction-grade tool that can drill holes of the perfect diameter no matter the project. Other cheap hole saw products weren’t happy with breaking after one use, so we designed our own durable product. These bits are perfect for a variety of projects such as cone-shaped orifice plates, pipes, ceiling lights and speakers. Hole Cutter made of high quality M42 carbon steel and HSS (high speed steel) two metals, HSS circular hole saw head thickness 1.8mm, cutting depth up to 38mm. 1 pilot drill, arbor and hexagonal spanner. LAIWEI Bi-Metal Hole Saw are suitable for a wide range of applications. Hexagonal mandrel for use with power tools, compatible with most drills from other manufacturers. Oil, rust, heat and abrasion resistant. Cuts quickly and cleanly, robust and reusable. How to assemble a hole saw? 1. Insert the drill bit into the mandrel and tighten the screw on the side of the mandrel with a hex wrench. 2. Insert the large mandrel into the top of the blade from the bottom. 3. Insert the tightening mandrel and the two protruding locking pins into the holes of the hole saw. 4. To ensure an accurate cut, make sure the screws on both sides of the mandrel are secured with a hex wrench without shaking. 5. The drill bit and hole saw are easy to be blocked during use and cannot be disassembled, making the drill bit fragile. Be sure to slow down the drilling speed when operating. We recommend using a machine with a drilling speed of 1000 or less. This will prolong the life of the hole saw. Package Contents: ・ 1 × Bi-Metal Hole Saw ・ 1 × Large Mandrel ・ 1 × Drill Bit ・ 1 × Hex Key NOTE: For safety, wear goggles and gloves when using the hole saw. What else can LAIWEI do?  7×24 customer service.