18mm / 3/4" Material Drill Guide (6mm hole) + steel insert

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This is a detailed guide designed to assist in drilling precise and accurate 6mm holes, exactly centered on the edge of 18mm or 3/4" materials. A larger clearance hole is provided where a steel insert should be firmly bonded with epoxy. This strategic design helps extend the life of the drill guide as a drill bit will inevitably degrade over time, causing the plastic to melt away. The correct size for mild steel tubing (which can be easily cut to desired length using a hacksaw) would be 10mm OD with a 2mm wall thickness and 6mm ID. For purchasing purposes, you can refer to this link: https://www.ebay.co.uk/itm/Mild-Steel-Precision-Round-Tube-Pipe-Many-sizes-lengths-Metal-Bar-Rod-Strip-1/253136715957?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 The side of the drill guide that comes into contact with the material to be drilled features carefully designed channels, allowing for easy removal of drilled materials. Feel free to modify and remix this design to suit different drill bit sizes or various material thicknesses.