unior chiave vite autoestraente sram dub 1609 2dub 5Designed to install and remove the self extracting screws of Sram DUB cranksets. Compatible with all Sram DUB crankarms. Precisely engineered with premium flex plus carbon steel CNC machined for superior durability and performance. The integrated 1 2 drive ensures compatibility with ratchet, fixed handle, and torque wrenches. The plates on the outer diameter of the tool allow it to be mounted in a vise or used with a 24 mm open end wrench.