Drill-Guide-Sealey-SDG01-Built-in-90-V-groove-allows-for-application-on-right-angles-cylindrical-stock-and-flat-surfaces-Aluminium-machined-bushings-ensure-accurate-drilling-in-4-5-6-8-10-12mm-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-Compact-drill-guide-with-additional-ruler-measurements-in-centimetres-for-added-precision-Seale