It can be used for perforation of wooden products, installation of spherical doors and windows, hinge and hinge installation, etc,meanwhile,Our forstner drill bits are suitable for drilling platform models such as handheld drills, electric wrenches, and bench drills 10pcs/lot Forstner Bit Cemented Carbide Drill Bit 14 50mm Forstner... 【High quality alloy technology】Hard alloy precision grinding blade. Nice Woodworking Ideas: Forstner Drill Bits Set Forstner Drill Bits Professional Drill Bit Kit 10Pcs Carbide Forstner Drill Bit Set - Woodworking Bits With Extension Bar Carbide Forstner Drill Bit Set Woodworking 6 And 12 【Widely applicable and High Compatibility 】It can be used with materials such as solid wood panels, large core panels, multi-layer fiberboard, etc. Warm Tips: The Forstner bit set is fit for pistol drill, bench drill, vertical drilling, machine hand-held electric drill, stand motor-driven drilling machine and mobile ribbon type magnetism drilling machine.Please wear eye protection at all time 【What will you get】5PCS forstner bits includes 35mm/1., 38,30mm/1., 18,25mm/0., 98, 20mm/0., 79,15mm/0., 59,1 pcs 150mm/5., 9 Extension Bar,1pcs 65mm/2., 56 Extension Bar,1pcs Limiter,1pcs Conversion Bit,1pcs allen wrench. Made of tungsten steel alloy material and treated with special heat treatment technology, the blade edge is sharp, hard, durable, and the opening is neat, smooth, and free of burrs