HIGH QUALITY MATERIAL-- impact-resistant ABS plastic, which is not easy to deform and break. Durable ADJIUSTABLE-- The drill guide is adjustable to tension wooden boards of different thicknesses. It is a great tool kit for furniture factory and woodworking fans. SCOPE OF APPLICATION-- Handheld woodworking jig for 6mm, 8mm, 10mm dowel joints toolsing guide tools.And suit for board thicknesses from 1/2 to 1-1/4.Suitable for use with most hand & power tools IDEAL TOOL -- Metal bushings ensure accurate alignment when drilling for perfectly positioned dowels.Allows for quick and accurately doweled corner, edge or surface joints. It is the ideal auxiliary tool for woodworking. INCLUDING- You will get 1 x Woodworking Doweling Jig, 3 x Drill Bits (6/8/10mm), 6x Limit Rings, 1 x Wrench, 30 x Positioning Pins, 3 x Dowel Bit.