The Veritas® ruler stop increases the usefulness of a metal ruler by providing a solid reference point. It is ideal for setting saw fences, repeat cuts, etc. To use it, slide the stop over the ruler end and tighten it at the desired position. The notched post at the tip of the brass adjustment screw allows even the thinnest rulers to be clamped securely. It will not mar the ruler edge. Repositioning is fast and easy. The stop’s anodized aluminium body is contoured to fit comfortably between thumb and forefinger with raised ridges for a better grip. Accommodates rulers from 7/8" (22mm) to 1-1/8" (28.5mm) wide and up to 1.27mm thick, the typical dimensions of rulers in the 300mm to 600mm range. At 1" (25.4mm) wide x about 2-1/4" (57mm) long, this tool is as compact as it is useful. Weight: 45g.