Q'Straint | 4 QRT Max Retractors with L-Track Fittings | Q-8301-L4 QRT Max Retractors with L Track Fittings Kit Includes: Qty 4 QRT Max Retractors w PLI Q8 6209 L * L Track not included SETTING A NEW STANDARD IN RETRACTOR SYSTEMS The QRT MAX is the premium series of self locking and self tensioning retractable wheelchair securement system. This fully automatic, knobless retractor provides a variety of innovative features that maximize ease of use to ensure passenger safety. Vehicle Applications: School Bus, City