Features 1、Two Position: This self locking knob switch has 2 positions, 1 open and 1 closed, which greatly simplifies your work. 2、25Pcs in All: Comes with 25pcs rotating switch in total, the large quantity will add more convenience to replacement. 3、Stable Works: The contact material is made of silver metal with good electrical conductivity for stable performance. 4、Wide Utility: Allows for flexible application in machine tools, textile industry, light industrial equipment, etc. 5、ABS Material: High quality ABS material has excellent durability against oil and wearing, very sturdy for long use. Specification Item Type: Rotary Switch Model: BEM-LA16-11X/21-F Material: ABS Mounting Hole Size: Approx. 16mm / 0.63in Function: 2 position self locking. Connection Method: Welding Foot Operation Function: Open Type Contact Form: 1 open and 1 closed. Contact Material: Silver Point Rated Insulation Voltage: 250V Package List 25 x Rotary Switch 25 x Sealing Ring