HIGH QUALITY: Our positioner is made of impact-resistant ABS plastic, which has high hardness and strength, not easy to deform and break, very wear-resistant and has a long service life. Suitable for most electric hand drills. ADJUSTABLE POSITION The drill guide is adjustable to clamp wood boards of different thicknesses. This is a great tool set for furniture factories and woodworking enthusiasts. PRECISE ALIGNMENT: Metal bushings ensure precise alignment when drilling for perfectly positioned dowels. Enable quick and smooth joints precisely. It is the ideal auxiliary tool for woodworking. SCOPE OF APPLICATION: Manual woodworking jig for 6mm, 8mm, 10mm dowel joints, tool guide tools. And suitable for board thickness of 1/2 1-1/4. Fits most power and hand tools. VARIOUS THICKNESSES: The stops allow you to easily adjust the distance from the edge. It can be used to self-center wood frames of different thicknesses on boards up to 1-1/4 thick.