The 1pc fits MARQUARDT 1246 Pushbutton Switch is a high-quality and durable switch designed for use with R139 lithium angle grinders. Available in multiple colors and styles, this switch is easy to install and use. It is suitable for a variety of applications in the automotive, industrial, and consumer electronics industries. Whether you need to replace a worn-out switch or install a new one, the 1246 Pushbutton Switch is a reliable and cost-effective choice.