Protecta Viper slide lock Model AC401 is a small letvægtsglidelås, which can be connected anywhere on a 10.5 mm dynamic lineup. The sliding lock is with carabiner, which is mounted directly to the fall arrest harness with D-ring on the chest or back. Allows complete freedom of movement by op-/nedklatring, and possibly. be stopped by glidelåsens braking takes effect. Sliding lock should be used only by 10.5 mm line model AC4xx. Approved according to standard EN 353-2.