Pushing, walking, jumping, and flying microrobots have been demonstrated. Other previous work has demonstrated microelectromechanical systems (MEMS) capable of creating silicon silk, as well as microrobots capable of assembling millimeter-scale carbon fibers. However, microrobots capable of manipulating very small diameter filaments, fibers, and wires initially external to themselves is still an area of open research. We have successfully demonstrated a silicon-on-insulator (SOI) MEMS device capable of pushing a 7 um diameter carbon filament through an adjustable width channel at speeds of 10um/s to 0.2 mm/s. Future applications include an array of individually addressable neural electrode implanters, a microrobotic spider, a wound or fabric stitching microrobot, plug-and-play linear servos for paper robots, etc.