Features two tools in one to install both internal and external SEIDO bottom brackets. With 3/8" ratchet socket to allow use of torque wrench.COLORBLACKMATERIALSteelSIZE16 & 12 NOTCHFOR USE WITHALL SEIDO T47 Bottom bracketsEXTRA INFOWith 3/8" ratchet socket to allow use of torque wrenchWEIGHT (g)205 g