Features: This 7pcs woodworking hinge installation set includes hinge drill bits and alignment tools for precise cabinet/door installations, crafted from hardened steel for extended tool life. The hinge drill bit creates clean holes while the hole saw efficiently bores larger openings, paired with a centering jig that ensures perfect alignment for screw placement every time. Ideal for carpenters, cabinetmakers, and enthusiasts requiring professional in hinge mounting for doors, window, or furniture projects. Suitable for kitchen cabinet renovations, wardrobe door installations, or woodworking tasks with quick changing bits suitable for standard drills for seamless workflow. Engineered for woodworkers seeking time saving solution, this hole saw set combines rust resistant steel construction with ergonomic design for controlled drilling depth. Specifications: Component:Steel Size:Approx.108mm/4.25inch Package Includes: 7Pcs Positioning hole opener note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.