Features: 【3 Pcs Drill Bit Set】Engineered with rapid ejection technology, this hole saw extracts in 5 seconds—70% faster than traditional models, delivering unmatched efficiency for drilling tasks on metal and ceilings. Premium construction achieves HRC65 hardness for 50% longer than carbon steel bits, resisting wear during high intensity wood, plastic, and thin metal drilling while maintaining sharpness. Ideal for both enthusiasts and professional contractors requiring in ceiling installations, cabinetry, or industrial fabrication projects with diameters ranging 65 80mm. Perfect for creating clean openings for recessed lighting, plumbing pipes, or electrical fixtures , plywood, or sheet metal up to 2mm thickness during renovations or construction. Integrated pin ensures ±0.5mm drilling accuracy, while tool installation adapts to any standard drill—streamlining workflow for urgent repairs or complex multi job . Specifications: Making: Alloy Size: Quick disassembly rod 20.8cm; hole opener diameter 6.5cm; dust cover diameter 12.5cm Diameter: 65mm, 75mm, 80mm Applicable scenarios: wood processing Package Includes: Quick disassembly rod 1Pcs 65mm hole opener 1Pcs 125mm dust cover 1Pcs note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.