cnc limit switches Contact Type: NO; Action Type: Momentary; Rating: 125VAC 2A; Terminal Type: 3-Pin Terminals. Size: 18mm x 26mm x 11mm ; Mounting Hole Dia.: 3.0mm. These micro switches features NO contact, momentary action and come with 1m 3-pin cables. The limit switches kit is compatible with 3018-PRO. Easy installation and long service life. It’s a perfect upgraded accessory for CNC without a limit switch.