The 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 Ensures The Safe Usage Of The Tool Keeps The Frame Getting Scratched.Specifications:- Diameter: 55mm - Diameter1: 46mm - Wrench size: 13m- Height: 80mm- Weight: 345g