QRT Standard Semi-Automatic, retractor wheelchair tie down system Lap & Shoulder Belt | Q-8200-AT-LQRT Standard Semi Automatic, retractor wheelchair tie down system Lap & Shoulder Belt The Q'Straint QRT Standard Semi Automatic Retractor System (Q 8200 AT L) is an economical, complete 4 point wheelchair tie down kit with lap and shoulder belts designed for vehicles equipped with L Track anchorages. Featuring semi automatic retractors with a single tensioning knob, this system secures both wheelchair and occupant in under 10 seconds while meeting all