Features and Benefits:The included pneumatic motor spins at 220 rpm and includes 6 different tap holders.Use with the optional work cart to make this a mobile unit so that it can be used anywhere in the shop.Air tapping spindleWork range 7.8" to 74.8"Dual stretch armSlanted arm for increased reachTable mount systemAdjustable spindle mount for variable degree tapping1/4", 3/8", 1/2", 5/8", 3/4" and 7/8" tap holders includedTapping arms are the easiest way to help an employee do repetitious work. TheATM-27-1900 tapping arm's advantageis that is has an ergonomic design; this is to protect workers from injuries that tend to develop over time during repetitious work. What makes this pneumatic tapping tool different is that it has a double articulated arm to extend its reach to 75”. The sturdy cast iron swing arm is connected to the base by means of a hardened and ground shaft that incorporates a leveling system. The twin parallel arms are made of heavy gage aluminum tubing that is effective at neutralizing vibration and torque reaction.