Q'Straint QRT-360 Retractor Mounted with L-Track Fitting | Q011012Single QRT 360 Retractor Mounted with L Track Fitting BUILT TO MEET TOMORROWS STANDARDS Kit Includes: Qty 1 QRT 360 Retractor w L Track Fitting Q011012 The first 4 point, heavy duty, fully automatic retractable tie downs built to withstand the higher loads of the WC18 standard and be compatible with WC19 wheelchairs. The latest RESNA WC18 standards for wheelchair tie downs and occupant restraint systems (WTORS) became effective in 2016; stating that