AT = All Terrain. Fitted with special wheels that absorb shocks on a bumpy, uneven athletic fields and extra axle ball bearing that make it roll smoother and more straight for easy line striping. All metal construction, sturdy, durable, easy to set-up, easy to clean-up and store. SSAT aerosol paint striping line marking machine is ideal for painting, striping, line marking of football, soccer, lacrosse, baseball, field hockey athletic fields. It's handle is fold-able for easy shipping and easy storage. It ships in a compact cardboard box, just unpack, unfold the spray handle and firm it up by tightening the installed wing nuts. To use, shake the aerosol can thoroughly as per label instructions and install the paint can in the horse-shoe type can holder on the SSAT machine. Adjust the tension on the cable, if needed, by using an adjustable screw underneath the handle trigger. Line spray width can also be adjusted by lowering or raising the two wing nuts attached to the side of the can holder. For sharp looking lines make sure the inverted aerosol can spray pattern is not obstructed by any part of the machine. To clean up any over-spray, let it dry and then easily scrape it off, then store machine.