The drill guide jig is made of high quality steel. It is lightweight and comes with a firm structure. The vertical drilling fixture is suitable for an opening diameter of 5/6/7/8/9/10mm. The precise positioning of the vertical drilling fixture makes your opening easier and more accurate. The drill guide jig can effectively improve the speed and quality woodworking operations. The center lines of the drill guide templates ensure precise alignment when drilling on various surfaces. Specification: Material: Steel, Plastic Open Hole Diameter: 5/6/7/8/9/10mm Package List: 1 * Open Hole Fixed Base + 6 * Steel Sleeve (5/6/7/8/9/10mm, each * 1) Color: Color: Red;Yellow