The AZTEK OMNI pulley blocks and sheaves are machined from solid aluminum, feature swivel connection points, and utilize high-efficiency bearings. These pulleys were developed in the early 2000’s by Reed Thorne of Sedona based Ropes That Rescue. The AZTEK system has become a valuable multipurpose tool of rescue and technical rope access practitioners. The AZTEK pulleys are offered individually or included in our AZTEK ProSeries System (item # 500104). Note: The Slate blue pulley includes the AZTEK quick release pin and the Orange pulley comes with the side becket cover and screw.