Here's what other sites are saying:
Auto-Locking belay for one or two followers. Multipurpose belay and rappel plate forged from aluminum alloy. Can be used with single, double and twin ropes and can be set up as an auto-locking belay for two seconds. WEIGHT 58 g, 2.0 oz SPECS ID: 0913 Rope Diameter Min (mm): Double 8-9 Rope Diameter Max (mm): Single 10-11
C.A.M.P. Belay Devices Ovo Belay Device Silver 913. Can be used with single double and twin ropes and can be set up as an auto-locking belay for two seconds.
Camp USA's Ovo Belay Device will quickly become your number one choice whether you're alpine climbing, canyoneering, or ski mountaineering. This compact, lightweight plate works for belaying or rappelling with single, double, or twin ropes. You can also rig it as an auto-locking belay when you're at the anchor.
On Sale. Camp USA Ovo Belay Device FEATURES of the Camp USA Ovo Belay Device Auto-Locking belay for one or two followers