Holds socket tool to BB axle to eliminate slippage during removal and installation. New spring preload allows increased flexibility and rotation during use New design works with square taper and splined axles with M8, M12, or M15 internal spindle thread Made from heat-treated tool steel for the ultimate in strength and lasting performance Use with Pedro`s Splined Bottom Bracket Socket. Compatible with Pedro`s Pro Socket Handle Socket Holder 6460211UPC/EAN/GTIN: 790983296964