Petzl GRIGRI + Belay Device with Cam-Assisted Blocking and Anti-Panic Handle, Suitable for Learners and Intensive Use - OrangePROGRESSIVE DESCENT CONTROL: 3: 1 mechanical advantage of the camming mechanism helps smoothly control the rope and reduce lowering efforts regardless of rope diameter. CAM ASSISTED BLOCKING: Cam assisted blocking ensures a comfortable belaywhen the climber falls or weights the ropethe cam in the device automatically cinches down to arrest the rope. Compatible with 8. 5 to 11 mm dynamic single ropes. ANTI PANIC HANDLE: If the user pulls too hard on