A dedicated tool designed for installing and removing Sram DUB cranks. The pins on the tool fit into the holes on the crank cap, making it easy to install/remove the crank cap. The tool is compatible with all Sram DUB cranks. Product attributes Designed for installing and removing Sram DUB caps. Compatible with all Sram DUB cranks. Precision engineered with CNC machined premium flex plus carbon steel for improved durability and performance. Integrated 1/2 hole attachment ensures compatibility with our ratchet, fixed handle and torque wrenches for convenient use. Flat surfaces on the outside diameter of the tool allow the tool to be mounted in a vice or used with a 24mm open-end wrench.