Features: water proofing and anti-corrosion precision scale, clear and visible numerical values, smooth and burr free body, detachable support, and base assistance for easy marking and positioning, stable marking without shaking. Name of a part:Cave ruler Material:Stainless steel ruler body, aluminum alloy backing, copper plated screws Usefulness:The triangular shape of the ruler allows for multiple uses, including measuring angles, heights, and distances, making it a versatile tool for any woodworking project. Scope of application:All scenes of carpenter Characteristic:Waterproof and corrosion-resistant, detachable backrest, smooth perforated ruler body, clear etched scale, not easy to wear and tear. Package include: 1pc Triangle hole ruler+complimentary automatic pencil