This groover has seam tracking wheels that follow the seamline to cut a trapezoidal groove for welding. It has a simple visual depth control knob that is labeled in increments of 1/10 of a millimeter. Chips are more effectively collected in the dust bag due to optimized direction of airflow within the housing. Comes with a 12 tooth 130 mm carbide tipped blade that is replaceable and resharpenable (No. 971), and a metal carrying case. A heavy grit diamond blade for metal-impregnated safety floor is available as an accessory (No. 972). Motor specifications: 110V AC 9A No Load RPM 12,000. Maximum cutting depth: 4mm.