Features: 1. This Self Centering Dowelling Jig can easily and accurately to find the center of wood board edge without measuring and tedious trial and error adjustments required. 2. The positioning is more accurate than normal doweling jigs, no offset or gaps are left. An essential tool for you to do with woodworking. 3. Made of high quality Aluminium Alloy with Anodic Oxidation processed, it is very durable in use, has a long service life and anti-rust. 4. Can be used to make accurate butt joints, miter joints and edge joints, as well as acting as a mortising guide. 5. This Drill Guide Set includes 6mm, 8mm and 10mm drill bushings for making different sizes of holes. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Material: Aluminium Alloy Battery: No Color/Style: As the picture shown includes: 1 set of Self Centering Dowelling Jig