The Sealey 4 Piece Precision Steel Square Set is a professional-grade measuring tool collection designed for accurate marking and checking of right angles in metalworking, carpentry and general engineering applications. Manufactured from solid steel construction, each square in this set has been hardened, tempered and precision polished to deliver reliable accuracy across a range of measuring tasks. The blade edges and stock face are machined to within ±0.016mm tolerance, providing the precision needed for quality metalwork, joinery and fabrication projects. This level of accuracy makes the set suitable for both workshop and site-based applications where consistent right-angle measurements are essential. The set includes four engineers' squares in 50mm, 75mm, 100mm and 150mm sizes, giving you versatile options for different scale projects and tight spaces. All four squares are supplied in a protective wooden storage case to keep them organised and protected between jobs. Backed by a li