Rupp CA-0157-4 Quad Lok-up Halyard Line Lock Wbungeerupp Lok-ups Are An Innovative Locking Pulley System That Locks Your Halyard Lines, Keeping Your Outrigger Release Clips Right Where You Want Them. 4 Locking Pulleys Mounted Side By Side With 12 Military Grade Bungee For Quad Rigging Or Adding A Teaser.robust Design That Includes The Following: Spring Loaded Trigger For Positive Locking And Unlocking. Modular Design That Is Adaptable To Various Rigging Setups. Accepts A Wide Array Of Halyard Line Material And Thicknesses. Replaceable, Serviceable Locking Components. Available In Single, Double And Triple Systems. Military Grade Bungee Cord With Stainless Steel Hardware.