Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Product Features: [Self-Centering Adjustable Doweling Jig]: This jig is constructed of heavy-duty steel for durability and long lasting use and is designed to be used with a hand drill or power drill. [6 Drill Guide Bushings]: The jig is designed to be used with 6mm, 8mm, 10mm and 12mm drill guide bushings for precise doweling or jointing. [Quick-Change Mechanism]: With a quick-change mechanism which allows for fast and easy change of drill bushings without the need for tools or additional parts. [Adjustable Width]: With the adjustable width feature, the jig can be used to drill straight holes in different sized materials. [VERSATILE APPLICATION]: The jig also includes a depth collar which allows for precise depth control.Our self-centering doweling jig can be used on a of materials, including wood, metal, and plastic. It can clamp workpieces of different thickness from 0.4 inch(10mm) to 2.2 inch(55mm). Material: Metal colour: Orange Package Contents: 1 x Self-centring jig 6 x Hardened steel bushings 1 x Wrench 1 x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.