M12 (1/2 inch) Tapping Machine - 40" (1000mm) Reach Pantographic Arm and Collet Set - 110v Electric Motor Articulated arm and electric driven motor with quick change collet chuck. (Bliz type) Tapping range M3 to M12 40"/ 1000mm working reach Simple push button forward and reverse operation LCD display with an easy to use menu system for setting RPM and thread pitch to program auto reverse