Model 288 air impact marker with 6″ stroke.
The model 288 has many different options available such as: different stroke lengths, mounting brackets and position sensors.
Picture below is of a 288-SP-OB-60-D-NL.
The 288 puts out 3 tons of force at 80 PSI.
For more information copy and past the link below or call 586-949-8400
http://www.columbiamt.com/CMT-Impact-Marking/Double-Acting-3-Ton.html