Built-in 90 V-groove allows for application on right angles, cylindrical stock and flat surfaces. Aluminium machined bushings ensure accurate drilling in 4, 5, 6, 8, 10 and 12mm drill bit diameters. Anti-slip thermoplastic rubber grip points on the corners of the drill guide to prevent slippage on surfaces. Manufactured from high quality solid plastic for increased strength and longevity. Compact drill guide with additional ruler measurements in centimetres for added precision.