GZ01101 | Groz Machinists Square 75mm Whilst ideal for everyday workshop use these are also suitable for woodworking applications. Made from high grade steel with hardened blade these squares have accurate right angles both on the inside and outside. Both the blade and stock are accurately ground which ensures straightness and parallelism. Specification Blade Length: 75mm Stock Length: 60mm Squareness of blade edges to working faces of stock: 48microns