About this item
- Premium aluminum alloy material and plastic circular pieces
- Dual-calibrated in inches and metric
- Universal angularizer ruler with 12 pcs of rulers and 12 pcs of knobs that can be folded at will
- One-handed operation with a unique fastening mechanism
- Suitable for holes with diameter of: 20mm, 25mm, 40mm, 45mm, 80mm, 85mm
- Multi-function for marking, positioning, drawing circles, tiling etc