The grigri is a belay device with assisted braking, designed for belaying both in the gym and at the crag. Compact and lightweight, it can be used with single ropes from 8.5 to 11 mm.the assisted braking function improves comfort while belaying, holding a climber or catching a fall. The design of the handled camming mechanism enables exceptional descent control.assisted blocking belay device, for climbing indoors or outdoorslightweight, compact and durable designsimple to use for belaying both lead and top rope climbersweight 175grope compatibility 8.5 to 11 mm dynamic single ropes and optimised for those 8.9 to 10.5 mmmaterials aluminium side plates, stainless steel cam and friction plate, reinforced nylon handlecertifications ce en 15151 1, uiaacolour grey