HIGH QUALITY: High quality alloy blade, hardened, tempered and carbon HSS steel construction make blade more sharp and durable. More smooth, less noise. | GREAT PERFORMANCE: Sharp edge, accurate positioning, high hardness, impact resistance, high precision, smooth cutting, high toughness. Forstner Drill Bits can drill clean flat bottom holes with no chipping. | PERFECT DESIGN: Small incision resistance, improve the opening speed. It's head adopt arc curve design, beneficial to chip removal, perforation is more efficient. | WIDE APPLICATIONS: Can be used for wood products perforation, mounted spherical door shoot tip, drawer, plastic products, wood, plywood, etc. Suitable for pistol drill, bench drill, vertical drilling machine hand held electric drill, stand motor-driven drilling machine and mobile ribbon type magnetism drilling machine, etc. | PERFECT SIZE: The size of this hole saw is 90mm (3-9/16"). We provide many other size hole saw to meet your professional needs, such as 15mm (19/32"), 20mm (25/32"), 23mm (29/32"), 25mm (1"), 28mm (1-1/10"), 30mm (1-3/16"), 32mm (1-1/4"), 35mm (1-3/8"), 38mm (1-1/2"), 40mm (1-3/5"), 42mm (1-5/8"), 45mm (1-4/5"), 48mm (1-7/8"), 50mm (2"), 55mm (2-1/6"), 60mm (2-3/8"), 65mm (2-9/16"), 70mm (2-3/4"), 75mm (2-15/16"), 80mm (3-5/32"), 100mm (3-15/16"). Please choose your needed item.