Stainless Steel GriGri Plus has a special mode for comfortable top-rope belay and an anti-panic handle Optimized for ropes with diameters from 8.9 to 10.5 mm Extremely durable, for intensive use, thanks to the stainless steel wear plate. A patented switch which allows the user to change the Grigri set up to alternate between lead climbing and top roping (a knob on the reverse of the device loosens / tightens a spring to make it easier / harden to pay out rope). Ship from OmniProGear, Inc.