The LEHLE SWITCH BTN is a momentary foot switch. It is housed in an M12 threaded enclosure made of stainless steel. Thanks to the gold plated contact material its life span is at least one million switching cycles electrically and mechanically. The LEHLE SWITCH BTN withstands an actuation force of 1,000 N, which is a force equivalent to approximately 100 kg or 220 pounds. Despite this it also has a smooth switching feeling when pushed by hand. If you choose the LEHLE SWITCH BTN as a replacement part it will fit straight into any hole of an existing foot switch that has a M12 or 15/32 UNS thread.