CMI "Micromouse" Pulley arborist knots book WLL stands for Working Load

WLL stands for Working Load Limit — the maximum load the hardware is rated for in normal use

Refer to the Petzl Instructions for Use for proper technique and limitations

The easiest way is to check when your Buckingham climbers were purchased: before June 2007 = pin style (this listing)

SRS (stationary rope system) involves climbing on one static leg of rope anchored at the base or crown of the tree

CMI "Micromouse" Pulley arborist knots book WLL stands for Working LoadThe two eyes on this micropulley work great for slack tending and attaching and streamlining your climbing system to your harness. Aluminum construction with a bushing mounted sheave for ropes up to 1 2. Swiveling side plates are easy to use, even with one hand! MBS: 31kN (7,000 lbs); WLL: 6kN (1,400 lbs)MBS: 7,000lbs (31kN)