The Linhof Heavy-Duty Cable Release is ridiculously well made and built to last. 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" / 53cm 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.