PRECISION MEASURING: The pocket ruler are wide and the slide square enough to the rule to make for accurate measurements on any drafting, The woodworking ruler are very handy for accurately placing cutting, The adjustable sliding mechanism locks down nice and tightly and allows you to make an easy measurement on the surface, The two thumb screws keep the slide secured and don't tend to loosen during use THICK AND DURABLE: The straight edge metal procket rulers is made of top aluminum alloy, The measuring ruler are not flexible, 1" wide, 5/32" thick, and have a nice black matte finish on them, machining, lettering and finish are excellent, good for marking, scribing lines CLEAR SCALE: The woodworking rulers are easy to read, and work very smoothly, pocket size, both inch and metric, laser etched, permanent grooves that will never fade VERTICAL SCALE & NOTCH: You can use the end vertical scale 1/4-3/4 inch to measure the height of your table router bit, or your table saw blade, There's a small notch in the end for a pencil to keep it in place while dragging the rule to make an alignment line and work good for marking WOODWORKING TOOLS: T-Type pocket ruler is moderate in size and easy to carry, the precision rule can be used as a good measurement tools for engineers, architects, and they can be used in workshops, home improvement, toolboxes, cabinet