Bosch Laser Distance Measurer GLM100 23 100 Foot Blaze Red Beam Digital (1 16 Inch Accuracy Backlit Display Rounding Indoor Tool) Crown Stapler Dual Router Compatibility: Engineered for Dual Router Compatibility: Engineered for peak stability in both handheld and stationary table mounted woodworking routers Integrated Pre Setting Size Scale: High visibility stamped scale along the hook jaw allows operators to set the required pipe diameter prior to mounting the tool Real Time Measurement Mode: Continuous distance tracking updates readouts dynamically as the device glides closer to or farther from target walls hold a white target card or piece of cardboard flat against the wall to maximize laser return signal intensity and ensure instant readout lock