Pedro's BB Socket Holder IIPedro's BB Socket Holder II. Holds socket tool to BB axle to eliminate slippage during removal and installation. 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.790983296964