The AXW4B-R is a sub-assembled component, specifically a red button for an IDEC TW series Ø 40mm push-lock, key-reset switch. This non-illuminated button features a 40mm mushroom-style head and is designed for use with a key-operated reset mechanism, providing a secure stop function. As part of the modular 22mm TW series, it contributes to a switch assembly that can be configured with various snap-on contact blocks rated from 5mA to 10A. It is commonly used in industrial control panels for applications requiring emergency stop or secure process control where a key is necessary to reset the switch to its operational state.