Trend 18.5 Inch Digital Angle Ruler for Precise Internal and External Measurements, DAR/500

MULTIPLE USES: This digital angle gauge is perfect for fitting skirtings or cornices, shelves into alcoves, and anywhere an angle needs to be taken, with easy-to-read rule markings. MATCH ANGLES: The centre locking knob lets you take a measurement/angle and transfer it to your table saw or mitre saw, for an accurate and professional fit every time. EXTREMELY ACCURATE: With precision-etched stainless steel ruler blades and an LED display registering in 0.1 degree increments, this angle rule provides accurate readings every time. ZERO-FUNCTION: The zero-function button makes it quick and easy to take accurate angle measurements, and simplifies additional setting out work. BUILT TO LAST: This angle rule is built to provide years of performance. It comes with a long-life CR2032 3V battery featuring auto power-off function to conserve power.