POSITIONABLE DRILL BIT: High hardness and heat resistance, the high temperature generated during drilling does not deform it, it is also durable, it can be used for a very long time. Its head adopts circular arc design, precise and clean flat-bottomed hole with quick waste removal and ensuring you work efficiently. (Please do not drill into metal) DEPTH STOP DESIGN: A depth stop can be fixed on the shank, which prevents you from drilling too deep, limited depth from 15mm to 45mm. You can also remove the stop for unlimited depth. Guided by the circular rim, it drills all circular arcs in all directions. Curved design, the head effectively removes debris and works efficiently. CEMENTED CARBIDE: Constructed of titanium alloy steel for long-lasting durability. Forstner Steel High Speed Steel drills overlapped, angled and perforated holes in all types of wood, makes it easy to drill hinge hole, cylinder hole, computer desk thread hole and household furniture fixing. X-WING DESIGN: The X-wing head provides visibility and stability during operation. The center spur of each drill bit ensures accurate drilling and prevents walking and wobbling during operation. Create perfectly round and accurate holes with the center spur design. WIDELY USED: Suitable for drill press, rotary hammer, bench drill, vertical drill, portable electric drill, drill press and mobile band drill. Can be used for wood products perforation, mounted ball door push points, drawers, plastic products, wood, plywood, etc. Product Description Reliable, Quality Tools The versatile bits included in this set are constructed with durable high-carbon steel for cutting a variety of materials. They cut extremely smooth and clean, flat-bottomed holes in all types of wood, including thin woods or veneers. Perfect Size: 15mm 19/32"), 20mm 25/32"), 25mm 1"), 30mm 1-3/16"), 35mm 1-3/8") Precautions: Be sure to put appropriate safety items for protection. Keeping cool or discontinuous use will greatly extend the life of the drill. High performance and reliable quality promised by TIPS: Cannot be used to cut metal holes. Before drilling, make sure there are no nails or other metal objects in the wood to avoid damaging the Forstner bits. High quality tungsten carbide steel, curved design for optimized chip removal High quality tungsten carbide steel, special heat treatment technology, sharp edge, high hardness and durability. The arc design of the cutter head improves the opening speed, easy chip removal, and less dust and debris during the cutting operation. The perforation is neat, smooth, without broken edges. Three-tooth cutter head with small cutting resistance The three-tooth design of the cutter head provides high sharpness, small cutting resistance, and improved opening efficiency. The sharp center spur accurately locates the center of your hole. The three-tooth design of the cutter head has high sharpness, small cutting resistance, and improved opening efficiency. The sharp center spur accurately locates the center of your hole. Robust blade, universal shank The hexagonal shank is made of solid, high-hardness hardened steel. Can be used in hand drills and drill presses. WIDELY USED Suitable for drilling holes on all wood and wood products, wood processing and maintenance, and model production. Can easily enlarge existing holes and drill any arc of a circle. Drills flat bottom holes, pocket holes and overlapped holes. Ideal for boring concealed hinges and door locks. The cemented carbide tip is designed to cut the hole cleanly. Can be used for drilling wood products, shooting point of mounted spherical door, drawer, plastic and wood products, plywood, etc. Suitable for bench drill, vertical drill and hand electric drill, stand motor drill, etc.