Feature:1. Excellent Aluminium Alloy: This woodworking drill guide is made of excellent industrial grade aluminium alloy, which is hard and durable, not easily worn and has a long service life.2. CNC Anodised Surface: This woodworking drill guide has a CNC anodised surface, which is wear and erosion resistant and clearly graduated.3. Drill Multiple Holes At Once: This woodworking hole drill guide has the ability to drill multiple holes at once and repeat the holes at a consistent angle without ruining the look or missing the angle, with steel sleeves sized to fit a variety of drill bits.4. 30 45 And 90 Drill Angles: The fixed angle of this woodworking drill guide is deviation free and allows for quick drilling of 30, 45 and 90 angle holes in posts and railings with impact drilling, saving time and effort and getting the job done quickly.5. Multiple Hole Size: This woodworking hole drill guide is available in four hole drilling sizes to meet your different drilling needs.Specification:Item Type: Woodworking Hole Drill GuideMaterial: Aluminium AlloyPerforation Angle: 30, 45, 90Hole Position (4 Sizes x 3):3/16in=4.76mm1/4in=6.35mm5/16in=7.93mm3/8in=9.52mm.Package List:1 x Woodworking Hole Drilling Guide2 x Extension Rod2 x Fixing Screw