[DURABILITY ALUMINUM ALLOY]: Crafted from aluminum alloy with oxidation treatment, anti-deformation. [PRECISE MEASUREMENTS]: Engraved inch and metric scales for clear and accurate readings,for marking tasks. [CONVENIENT DESIGN]: Features a large center hole for easy finger placement to secure the ruler on workpieces,preventing slippage. [EASY TO USE]: Glossy exterior for effortless placement and movement,safeguarding delicate cutting edges from damage. [VERSATILE TOOL]: With a 15mm thickness,ideal for measuring height and angles,making it a must-have for woodworking projects., Manufacturer: WDWDW