Description: ADJUSTABLE: This multifunctional woodworking hole opener is adjustable and can be used for wood, , gypsum board, aluminum plate, and more. DURABLE: Universal woodworking hole opener made with high quality hard alloy material and tungsten steel heat treatment, this hole opener wear resistant edge for fast and accurate drill. VERSATILE: Adjustable punching saw building in scale with diameter of 45-130mm, and thickness of 30mm, this hole opener is suitable for clamping electric drills with a thickness of more than 10mm. STABLE: The adjustable center hole jig guide are kept perpendicular for stable and accurate positioning, while the triangular handle design effectively prevents slippage during use. POCKET HOLE SET: This woodworking hole drill perfect for DIY home projects or professional woodworking supplies, for both furniture factory and woodworking enthusiasts. Specification: Material: Alloy Size Chart: Diameter: 4.5cm-13cm/1.77inch-5.12inch Thickness:3cm/1.18inch Diameter: 14.6cm /14.6cm/5.75inch   Package Includes: 1 Set Adjustable Punching Saw