[Easy to Adjust] It is adjustable with scale. The hexagon socket screw fixed slot can be adjusted according to needs, engraving, clear and not easy to wear, and the countersink is more accurate [What You Get] The package includes 1 limited countersink drill, 4 countersink drill bits, 1 hexagonal wrench and 1 plastic ring. This kit can meet the drilling needs of various common sizes of 3/16x1/2inch, 1/8x3/8inch, 11/64x1/2inch, 5/32x3/8inch and 9/64x3/8inch [Premium Aluminum Alloy Material] This limit countersink drill bit set is made of premium aluminum alloy on the main body, which is beautiful, with high hardness and long service life [Quick Change] The drill head can be replaced according to needs, easy to use, and quick replacement. Two-way quick release. It can be used for countersinking and screwing, double-purpose operating, convenient and simple, and can be applied to a variety of places [Widely Uses] This wood countersink drill bit set is suitable for bench drills, hand drills and conventional electric drills. It can be used for wood, fiberboard, particleboard, plywood, etc, Manufacturer: Akfldms