Features 1、Solid metal construction is sturdy and durable for long time use. 2、Adjustable, it can clamp on different thickness of wood boards from 10mm to 55mm. 3、The drill bushings adopt premium material, high strength and accurate positioning. 4、Easy to install and convenient to use. 5、Suitable for drilling holes and making joints of wood boards, perfect tool for plate furniture. Specification Features: Solid metal construction is sturdy and durable for 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 for drilling holes and making joints of wood boards, perfect tool for 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 Jig kit Package List