Black Diamond Hotwire Carabiner Closeout. The worlda s first wiregate climbing carabiner when it was originally made back in 1995, the HotWireA revolutionized carabiner design. It remains an all-season, all-around favorite worldwide because of its optimal size-to-weight ratio. Whether youre crimpin down on a nasty hold or stumbling around in a whiteout, Black Diamonds unrivalled HotWire is clip-friendly due to the flat gate-to-rope interface, and its low mass keeps gate whiplash to a minimum. Plus, it resists freezing shut in wet, cold conditions.