Experience unparalleled precision with the Moore & Wright 4004 Engineer's Square, a premium Grade B measuring tool meticulously crafted for engineers and skilled craftsmen. This 100mm (4 inch) square is essential for achieving accurate right angles in all your projects. With a blade size of 130.2 x 25.4mm and a stock size of 76.2 x 25.4mm, this tool offers exceptional versatility for a multitude of applications. The inner working dimensions of 57.0 x 104.8mm allow for precise measurements even in the tightest spaces. Each Engineer's Square comes in retail-ready packaging, making it an indispensable addition to any toolkit, whether for professional use or DIY endeavors. Trust in the renowned quality of Moore & Wright to deliver the accuracy you need for every job.