Tracer 7'' (175mm) speed square machined from robust yet lightweight aluminium. Precision carpentry tool ideal for marking out lumber and rafters. Equipped with 2 rulers and angle marking guides: the horizontal ruler allows for quick measurements or markings from the inside edge of the square, and the vertical ruler allows for quick measurements or markings from the T-section of the square. Also features pre-calculated, metric hip and valley rafter scales for marking rafters when working in degrees. Can be pivoted to enable simple 0°90° marking along the long edge. Aluminium Body 0-90° Protractor Scale Hip & Valley Rafter Scales Metric Rafter Scales Horizontal & Vertical Ruler Aluminium Body 0-90° Protractor Scale Hip & Valley Rafter Scales Metric Rafter Scales Horizontal & Vertical Ruler