Advanced Materials:Made of high-grade aluminum alloy, it has high hardness, wear resistance, oxidation resistance, firmness and excellent use effect.Precise size and exquisite workmanship Specification: Straight Hole, Maximum Support Plate Thickness: 1-3/4 Inch (45mm), Drill Guide Diameter:2/3/4/5/6/7/8/9/10mm Package:1PC Drill Guide,8different sizes (3/4/5/6/7/8/9/10 mm) Drill Bushings, 6/8/10mm diameter Wooden Dowel Pins 5 of each.so that to easily drill holes of different sizes and meet various holing needs Simple to use-:Adjust the position of the feet to fit different thickness board, quick and easy to punching holes on the side of wood boards with good verticality and higher punching accuracy.Return or exchange at any time, contact us at any time if you have any questions Wide range of uses:Dowel Drill Guide is usually used for precise positioning when punching holes on the side of wooden boards, and quick positioning of openings to make seamless splicing between boards. It greatly improves work efficiency Self Centering Doweling Jig, Dowel Drill Guide 2/3/4/5/6/7/8/9/10mm Self Center Dowel Jig Handheld Drill Guide for Straight Holes Wood Panel Hole Puncher Locator Woodworking Joints Tool Color: As Shown Material: Metal Package Contents: 1*Self Centering Doweling Jig 8* Dowel Drill Guide 15*Drill Bushings 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.