I'm with you spinesnaper! Many a "Leaver Biner" has been known to unclip from my harness. No need for a "block". Lets see???? In the 2-3 days of canyoning there with you in N.W., what maybe we have to leave 3-4 "Leaver's" at a cost of $8 ea. for a total of $32. Not bad considering the price of gas up around $3.50. $32's a pretty fair price to pay to not have to waste time and gas! BTW.....I'm with you so wheres the beer?