SafeBloc is a triple hole thimble designed to add friction in the rigging system at the top of the tree, increasing safety by reducing rigging point stress, compared to a system using a block or pulley. Also, with the benefit of friction, the climber can often take over on the rigging line AFTER the groundperson controlled the initial drop particularly on small-to-medium loads. This frees up the groundperson to use both hands and the climber can FINISH the lowering. Use the SafeBloc anywhere you'd use an arborist block for lowering. The rigging line is woven through the three holes for maximum friction or fewer holes for less friction. Designed by David Driver and made by SHERRILLtree.