PACKAGE INCLUDED: 1 x Punching Locator, 1 x 6mm Pin, 1 x 8mm Pin, 1 x 10mm Pin, 3 x 8mm Drill Sleeve, 3 x 6mm Drill Sleeve, 3 x 10mm Drill Sleeve. The Woodworking positioner is adjustable to clamp on different thickness of wood boards from 17mm to 60mm. It is a great first choice for DIY and woodworking enthusiasts.PRECISE POSITIONING: The bearing steel drill sleeve is threaded for precise positioning. After the improvement of the version, the woodworking positioner provides with 6mm, 8mm and 10mm bushings for making different sizes of holes. You can easily and accurately find the center of the required positioning.DURABLE MATERIAL: The drill guide is made of high quality aluminum alloy 6061 and the material of the bushing is die steel. Due to the good quality raw material, the woodworking dowelling jig is high hardness and strength, good wear-resistant and durable to use. You can use it for many years with just one purchase.UNIQUE DESIGN: Self Centering Dowelling Jig adopts unique parallelogram design. The arms of the jig are an always-reliable parallelogram that never fails to find dead center. Simply align the precision-machined notch on the jig's center bar with the dowel location mark on your board, hold the jig and drill.WIDELY USE: The portability and practicality of the self centering dowelling jig make it an ideal first choice for furniture makers and carpenters. It is a good helper for you to repair daily furniture. Just choose this woodworking positioner, and it will make you more confident in the new things you try to create in the future.