Socket inserts for use with the Pedro`s Pro Socket CupAs new bottom bracket standards emerge, additional inserts can be easily introduced, enabling mechanics to expand their toolkit affordably and efficientlyInserts are placed into the Pro Socket Cup and are held in place magnetically with a satisfying clickBB Adapter ToolBlack12-Notch49mm6460766PraxisUPC/EAN/GTIN: 790983298791