USB Protractor Digital Level Box with Laser 4-Side Magnetic Angle Finder 4*90°

Accuracy: +/- 0.1° at 0° and 90 ° and +/-0.2°at the rest(Classified as Class 2 laser products, with an output power of less than 1 MW). 【Strong Magnetic Upgraded】 This is the Craftsman's Choice. Not only the baseboard, but also the strong magnetic upgrade at the four sides.

eBay