Material This hole opener tool is made from a heat-treated tungsten steel alloy with sharp, wear-resistant edges for fast and efficient drilling. Adjustable hole saws These multifunctional adjustable hole saws are designed for a variety of materials, including wood, PP, plywood, drywall, and aluminum-PP sheets. They are an essential tool for any DIY enthusiast or professional. Design The blade head and the centering drill stay vertically aligned with the cutting disc to ensure stable positioning without deviation, enabling fast and precise hole cutting. Non-slip The adjustable hole saws feature a triangular grip design to prevent slipping during drilling. Performance and compatibility - Durable construction and sharp edges provide reliable performance across supported materials. - Adjustable sizing allows use with different hole diameters as needed. - Designed to maintain alignment for accurate, clean hole cuts. Use scenarios - Electrical and wiring installations: drill clean holes in wood or drywall for cables, conduits, or grommets. - Woodworking and furniture making: create precise holes in plywood or aluminum-PP panels for hardware, dowels, or cable routing. - General DIY and home improvement: cut accurate openings in PP sheets or composite panels for vents, pipes, or fixtures.