UNIOR: Product featuresThe tool is designed to remove the non-threaded BB30 & Sram DUB bottom brackets from the frame. The tool safely pulls bottom bracket cups out of the frame without the use of a hammer. It features two interchangeable dedicated pullers, a 30mm puller for BB30 standard and 29 mm puller for Sram DUB press fit bottom brackets. When using the tool with a 30 mm puller, the tool is also compatible with many other bottom bracket standards using bearings with 30 mm internal diameter. The rubber O-ring on the tool ensure the save usage of the tool keeps the frame getting scratched.