The Arm is manufactured as a basic 7 foot (2.1 m) stroke model; SPA-7 with mounting kit and hydraulic kit. Mounting Kits are configured as a 30 ft span ( 9.0 m ) for use in Drilling Derricks up to 30 ft x 30 ft base and 18 ft ( 5.5m ) span for use in Drilling Masts with various size leg or vee-door member. Hydraulic Kit is configured for use with the HawkJaw Senior (utilizes existing winch controls), and HawkJaw Junior (includes directional valve and console bracket).