Universal wood countersink from Trend The Trend Universal Countersink bit is a versatile addition to any toolbox for the woodworking professional or DIY fan. Specifically design to create chamfered holes in wood and man-made materials. The wood countersink clamps onto any drill bit between the sizes of 3.0mm and 7.2mm in diameter. A versatile tool that can be reversed so it can be used as a non-cutting depth stop. Whether you're a professional tradesperson or a DIY enthusiast, this countersink attachment is an essential addition to your toolkit. Ideally suited for use in a variety of projects. Recommended for wood and man-made boards By reversing the countersink on the drill, it can be used as a non-cutting depth stop. Ensure flutes of drill are aligned with flutes of countersink. Do not overtighten screw. Not suitable for ferrous and non-ferrous metals. Part of a growing range of drilling accessories at Fusion Fixings.