GM CLIMBING UIAA Certified 30kN Swing Cheek Micro Pulley CE General Purpose Light and compact micro pulley. You could use it in 100 applications, in hauling, dragging, tensioning system, in rescue, tree climbing, and etc. Swing cheek makes the rope installation and removal much easier, which much facilitate the system setting process. Smooth rotation provides maximum mechanical advantage. Of 30kN Breaking strength, the pulley will satisfy almost all your requirements. Blue-Ball bearing: less contact area with axle, more efficient with very little friction in system, excellent for high speed use. Black-Bushing: larger contact area with axle, much less wear for longer service life, suitable for slow rigging with heavy weight. Light and compact, the micro pulley will take up almost no space in your rack.