General Tools 828 Digital Sliding T-Bevel Gauge & Digital Protractor in One DURABLE - Commercial grade digital sliding T-bevel and digital protractor with impact resistant ABS handle HOLDS MEASUREMENTS- on digital angle finder for transfers between different surfaces or jobs TRANSITIONAL DISPLAY - Digital angle gauge has a reverse display button and flip display button with a locking knob for manual measurement transfer. Full LCD display with large digital angle readout. AUTOMATIC SHUT-OFF- feature that preserves battery life of the woodworking tool DUAL APPLICATION - T-bevel/digital protractor combo- is made with an ergonomic impact resistant handle with 8-inch stainless steel blade used for taking measurements