These switches have a removable ring with tab which can be inserted into the switch several ways to your particular requirements. For example, if you purchased a 1 pole x 12 way (max) switch you could convert it to, say, 1 pole 7 way between stops. They have a standard 1/4" shaft. Panel hole 10mm. Contact rating 150mA at 240VAC.Cutout 9.5mm. 3 Pole From 3 pole 2 position to 3 pole 4 position