General description The Pre-square Carpenter Metal Aluminum Folding Triangle Ruler is a multifunctional tool designed for carpenters and DIY enthusiasts. This versatile ruler features a folding design that allows for easy storage and portability. With both metric and imperial measurement units, it caters to various measuring preferences. Technical specifications Material: High-quality aluminum alloy Length: 310mm Measurement units: Metric and imperial Angle adjustment: Adjustable positioning tool for various angles Usage Ideal for woodworking projects Can draw 45° and 90° angles Useful for scribing slopes and chamfering roof rafters Equidistant center point drawing and vertical line marking Other information Concealed stainless steel scriber for precise marking Matte black finish to prevent glare Corrosion and oxidation resistant