Q-STRAINT Wheelchair Restraint Kit. For L-Track. QRT Deluxe Retractors.For shuttle bus. This kit contatins four QRT Deluxe retractors for L-Track. Retractable shoulder belt with L-Track fitting at top. Lap Belt. Mounting hardware for shoulder harness. Installation manual. User instructions wall sticker. Warranty card(3 Year Manufacturer Warranty) Does not include L-Track floor anchoring hardware. Used in shuttle buses equiped with L-track anchorage system.