Features High-strength Stainless Steel: Durable stainless steel shell with a glossy finish ensures long-lasting performance and a professional look. Efficient Waterproof Design: Professionally tested for efficient waterproof performance, providing reliability in various environments. Single Pull Security: Prevents key removal when the switch is on, enhancing security and preventing unauthorized access. Flame Retardant Base: High temperature resistant and flame retardant base provides safety in emergency situations. Versatile Applications: Suitable for car and computer modification, access control switches, CNC machine tools, and industrial control instruments. Specification: Item Type: Key Switch Material: Stainless steel Uses: Car modification, computer modification, access control switches, CNC machine tools, industrial control instruments Working Voltage: 220VAC/DC (maximum) Working Current: 3A Level Position: ON-OFF Installation Size: Approx. 12 x 23mm / 0.5 x 0.9in 1. Single Pull: The key cannot be pulled out when the switch is turned on 2. Double Pull: When the switch is turned on and off, the key can be pulled out Package List: 10 x Key Switch 20 x Key 10 x Nut Package List 10 x Key Switch 20 x Key 10 x Nut