Drill Guide from Bicycle Valve

Did you know that valves of a bicycle inner tube are perfect drill guides? I recently created a 3D-printed drill guide (Fig.: (1), (2)) that can be used with a vice clamp (Fig.: (4)). This innovative tool is crafted from brass, offering excellent protection for your drill bit. It features an external thread, allowing you to screw it securely in place. As shown in picture (A), you can achieve precise angles or straight holes effortlessly. Simply slide the guide into the vice clamp to fix it in place, and you're ready to drill. I designed two versions: one for straight holes and another for drilling diagonally through three boards.