This special OEM approved component is made for Hitachi angle grinders. It is designed to provide a user with a comfortable grip for operating the switch. Note, this is an identical replacement for a missing or a damaged slide knob that was installed on a new unit. To ensure the correct application of this hardware make sure to refer to t...Read morehe owners manual and the appropriate diagrams of your specific model. This high-quality slide knob is made of durable plastic and is sold individually.