Hobby Knife with Retractable Blade from BenchCraft - BCT5026-013
An essential part of any hobby's toolbox, this affordable hobby knife's razor sharp steel blade is suitable for cutting most crafting materials including thin balsa wood, wire insulation, canopy plastic, car body shells, paper tracing, and more!  Its unique segmented design allows the blade to be retracted when not in use, and each segment can be broken off to renew the blade's cutting edge.