Derrick Surveying Tape, 1 4 in x 100 ft, E1 no checkout methacrylate based threadlocking adhesive which fluoresces methacrylate based threadlocking adhesive which fluoresces under UV light to allow monitoring With steel fixture time of 10 minutes with the ability to light an entire area Solid state power provides maximum light output throughout battery life 90 degree tilting head reduces neck fatigue Durable Chrome Clad® blade Extra large winding drum provides rapid line recovery and permits tape line to be easily detached from reel Special hook ring with ribbed face at zero Leather thong is provided to use through eye at rear when tape is removed from reel