For The Belayer That Wants Versatility! With An Anti-panic Handle That Makes It Particularly Suited For Learning, The Grigri + Is A Cam-assisted Blocking Device For Climbing In The Gym Or Outside. The Selector Knob Allows The User To Choose Between Two Belay Modes: Top Rope Or Lead Climbing. Reinforced For Intensive Use, It Can Be Used With Single Ropes From 8.5 To 11 Mm.