Black Diamond Lockdown leash

Black Diamond's Lockdown leash does cut down on this a bit, because the loop that releases the slipknot can be looped over the hammer or adze (gently!) to release it. Sold singly in left-hand configuration only, so don't forget to pull the long part of one leash through and re-thread it from the other side for the right hand, a little tip they neglect to mention. Bottom line, slipknots are fine for alpine use, but for vertical ice go with a clip.