Description:Adjustable 30-130mm Circle Hole Saw Drill Bit Cutter Kit DIY Tool Specifications: Size: 130mm: 3-130mm Material - Alloy Steel - Cutting Depth30mm - Shank Diameter10mm (Suitable for 10mm diameter electric drill)Suitable for drill - Plywood, Laminates, Composite, Gypsum, Rubber, Plastic, Hardwood etc. - Quantity: 1 x Steel Circle Cutter1 x spare drill bit1 × 3mm Hex Key Wrench Features:Adjustable Plane type design. - Wide range of uses, hole diameter size can be adjustable. Alloy blades, cutting smooth, the hole wall are smooth and no glitches, good effect of the straight roundness, opening hole depth is 30mm. - 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. How to use:1. Two blades reach drill center distance are equal, can open hole.2. Two blades reach drill center distance are not equal, can get concentric rings and circles.3. Before drilling to check whether the blade is fixed and adjustable diameter bolts tightened to prevent accidents4. When the blade is not sharp please grind the blade then use. Package Included:2Set x Circle Hole Saw Drill Bit Set