Drill bits that can be attached to drill chucks can be compatible with 0.06 to 0.4 inches (1.5 to 10 mm). Most drill bits you already own. The drill bit can be firmly secured with a dedicated wrench, so the drill will not come off while working. It is specifically designed for woodworking drilling holes in wood and wood boards, but it can easily be drilled on soft metals such as plastic, acrylic boards, printed circuit boards, aluminum boards, etc. It provides strong support for your work when you need to drill holes in your wall or thread through your cords.