COMMAND ACCESS TECHNOLOGIES - MLRK1-MRK 48" MOTORIZED LATCH RETRACTION KITM9900 & M8800 SERIES Command Access $545.00 $545.00 The new MLRK1-MRK/DH is a practical and cost-effective way to convert a mechanical Marks M9900/M8800 & Design Hardware 10000 series 36″ device to an electrified latch pullback device. The retrofit kit will maintain all UL... Add to Cart