Description:High hardness material, not easy to wear, strong strength and long durabilityCenterlines ensure accurate alignment when drilling into various surfacesComes with 5/6/7/8/9/10/12mm size of drill bushing for good match of various workPositioning and hole drilling guide, you can improve your woodworking projectsIt is a great tool set for both furniture factory and woodworking enthusiastsSpecification:Material: Aluminium AlloyDrill Guide Diameter: 7.7 cm / 3.03 inPackage Includes:5pcs Set: 1 x Drill Guide, 1 x Hex Wrench, 3 x Drill Bushing (6/8/10mm)8pcs Set: 1 x Drill Guide, 1 x Hex Wrench, 3 x Drill Bushing (6/8/10mm), 3 x Stop Collar (6/8/10mm)9pcs Set: 1 x Drill Guide, 1 x Hex Wrench, 7 x Drill Bushing (5/6/7/8/9/10/12mm)16pcs Set: 1 x Drill Guide, 1 x Hex Wrench, 7 x Drill Bushing (5/6/7/8/9/10/12mm), 7 x Stop Collar (5/6/7/8/9/10/12mm)Note:Please allow 1-3mm error due to manual measurement, make sure that you do not mind before you bid.Due to the different monitor and light effect, the actual color may be slightly different from the picture color.'