Features 1、The product is made of high quality steel, with a firm structure and light weight. 2、Suitable for opening the diameter is 5/6/7/8/9/10mm. 3、Precise positioning makes your opening easy and precise. 4、Can effectively improve the speed and quality of woodworking operations. 5、Centerlines ensure accurate alignment when drilling into various surfaces Specification Feature: The product is made of high quality steel, with a firm structure and light weight. Suitable for opening the diameter is 5/6/7/8/9/10mm. Precise positioning makes your opening easy and precise. Can effectively improve the speed and quality of woodworking operations. Centerlines ensure accurate alignment when drilling into various surfaces Specification: Material: Steel, Aluminium Alloy Color: Red; Yellow Suitable 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) Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. Package List