Features Solid metal construction is sturdy and durable compatible with long time use. Adjustable, it can clamp on different thickness of wood boards from 10mm to 55mm. The drill bushings adopt premium material, high strength and accurate positioning. Easy to install and convenient to use. Suitable compatible with drilling holes and making joints of wood boards, perfect tool compatible with plate furniture. Features: Solid metal construction is sturdy and durable compatible with long time use. Adjustable, it can clamp on different thickness of wood boards from 10mm to 55mm. The drill bushings adopt premium material, high strength and accurate positioning. Easy to install and convenient to use. Suitable compatible with drilling holes and making joints of wood boards, perfect tool compatible with plate furniture. Specification: Material: Aluminum alloy Color: as the picture shows Suitable wood size: 10~55mm/0.39~2.17in Weight: approx. 1132g/39.93oz Package list: 1set x Self Centering Doweling Jigkit Package List