The Linhof cable releases are ridiculously well made and built to last-one often encounters perfectly operational Linhof releases upon the secondhand market, manufactured more than half a century ago and with many thousands of exposures under their belt.  They have a particularly long, strong throw.  In fact, they are amongst a very short list of cable releases which can trigger Copal Press shutters(which release and cock again all in one action, requiring more force) with crisp reliability.

The 002431 is a 21″ (53 cm) cable release that helps prevent camera shake for super telephoto shots, macrophotography and bulb exposures.  Cable releases are also quite handy for taking pictures of difficult-to-approach subjects as well as minimizing vibrations with closeup and lengthy timed exposures.