Korkers Long Steel Spike Kit for TuffTrax - 40 PackTuffTrax Long Threaded Steel Spikes are used to eliminate footprints on concrete and epoxy projects. Traction:Provides added traction for shake roofs, wood surfaces and ice. Includes:40 pack of 7mm long spikes.Features of Korkers Long Steel Spike Kit for TuffTrax - 40 Pack 40 pack of long threaded ..