Specifications: Material: Alloy blade Color: Silver Adjustable capacity 30mm(1.18") to 300mm(11.8") Shank diameter: 10mm Heavy-duty woodworking construction with longest tool life Multi-functions, very convenient and affordable Having adjustable two sharp blades on both side of the measure-bars Adjustable plane type design Can be used cut many kinds of materials, such as plywood, hardwood, laminates, composite, rubber, plastic, etc Notice: 1. When drilling the hole, the two sides need to be equal in distance, if not equal, the force will be uneven. 2. Set the two blade holders at the desired graduation on the measure bar by tightly screwing the hexnuts using an L-shape hex wrench. 3. Please don't use on steel sheet or other metal. 4. The speed of drilling must be slow, and the material of drilling does not contain iron, nails or other metal. 5. Can not be drilling the hole backwards in the ceiling, can only go vertical drilling from the top down.6. Before boring, hold the two sides of veneer or timber firmly by stepping on it. Take care to set the twist drill or chisel end drill at the center of the desired hole, then start boring. When using a power drill, be sure to contact the cutting blades gradually and slowly on the object to be bored. Abrupt contact of the blades on the boring object can give shock to your hands. 7. If you wish to do deep boring (1" to 2", or 25mm to 50mm), use the "free doughnut" from one side of the timber, then start boring again from the other side until the cutting blades bore through a hole making a doughnut-shaped disc. Notice: please don't use on steel sheet or other metal Package include: 1 pcs adjustable 30-300mm Metal Wood Circle Hole Saw Drill Bit Cutter
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