Features Centre Finder: Used to scribe the centre of the circular plate and the shaft, making the measuring much easier. High Accuracy: Ensuring high accuracy, this centre finding gauge will largely improve your working efficiency. Measure Range: With 12in scale on the body as well as standard 45° and 90°, the ruler has wide measurement range. Good Material: Adopting premium aluminum alloy and stainless steel, not easy to deform, has durable for long use. Easy to Carry: Light in weight and compact in size, the center gauge tool is very convenient for daily carrying. Specification: Item Type: Center Gauge Material: Aluminum Alloy, Stainless Steel Use: For drawing at 45° and 90° as well as line, center, and for depth measurement.  Package List:1 x Center Gauge 1 x Positioning Block Package List 1 x Center Gauge 1 x Positioning Block