The Securerail Vertical Ladder System Trolley is equipped with rollers so that the trolley follows the user perfectly when climbing up or down a ladder. The trolley follows the user smoothly in its movements up and down and passes easily through the whole system. It locks instantly in case of a fall when using with the Securerail system.Features:Integrated with energy absorberBlocks falls instantly and reduces fall forces and free fall distancesEquipped with an anti-inversion mechanismThe user can connect safely at the end of each trackEquipped with high strength ANSI rated carabinerStandards and Specs:Trolley Weight Capacity: 110 lbs - 310 lbsTrolley Breaking Strength: 3,330 lbsTrolley Standard Compliance: Meets or exceeds ANSI A14.3, OSHA 1910.29 Subpart D, and EN 353-1:2017Connector Breaking Strength: 5,395 lbsConnector Standard Compliance: Meets or exceeds ANSI and OSHA StandardsFrontline VLRS Securail Pro Vertical Lifeline System (optional)Features:Light aluminum railUndeformableRigid rail Ergonomic, easy useCompatible with safe roof access extensionsFreehand systemTrolley equipped with an energy absorberEasy to retrofit on existing ladders (Securail Pro) Length: 20', 30', 40'Application: Ascend/Descend on Fixed LaddersSystem Breaking Strength: 3,300 lbsSystem Max Users per System: 2System Standard Compliance: Meets or exceeds ANSI A14.3, OSHA 1910.29 Subpart D, and EN353-1:2017