SpecialHybrid Acme style nut and screw design, no brake needed.SpecialSpecialSpecificationsSpecificationsValueAnti-rotationNoBrakeno (self Locking)MaterialCopper; Steel; Zinc; Aluminum; PlasticScrew TypeAcmeTemperature Max150 °FTemperature Min-20 °FUPC Number884107287423Voltage12 VdcWeight17 lbDimensionsDimensionValue[A]29.32 in[S]20 inPerformancePerformanceValueDuty Cyle25 %Load, Static, Max3000 lbf