The Bosch Power Tools 1609B02308 Arm helps support the movement and positioning of compatible power tool components during operation. Designed as a replacement arm, it works with related mechanical parts to help maintain proper alignment, controlled movement, and reliable tool functionality. A properly functioning arm is important for supporting smooth component movement and maintaini... https://www.wholetoolbox.com/bosch-power-tools-1609b02308-arm/1609B02308.html