This Harmony Xb4, Black Head With Key (Key No.455) For Key Selector Switch Has 3 Positions, Operates With Spring-Return-To-Center Mechanism With Key Withdrawal On Center Position. This Head With Key Provides A Versatile Interface For Controlling Your Machines. It Is Easily Installed And Replaced On Compatible Complete Key Selector Switch Units To Provide A Secure Manner For Authorized Staff To Switch Between Process Or Machine Operating Modes. It Is Impact Resistant, Dust Resistant, Water Resistant And Vibration Resistant Thanks To Its Ip66. It Has A Metal Bezel, This Makes It Ideal For Applications Requiring High Impact And Vibration Resistance. It Is Designed To Fit In A Standard 22Mm Cutout, Ensuring Compatibility When Installing In Pre-Existing Machinery. Secure Machine And System Operation With A Key, Only Available To Authorized Operators. Its Wide Range Of Operating Temperatures From -40°C To 70°C Allows Versatility In Usage Of Product. Key Removal Allowed In Only One Of The Positions, Allowing For Advanced Interlocking Between Various Parts Of A Machine Or Process, While Limiting Human Errors.