4Pcs Socket Stud Screw Extractor Remover Installer 6/8/10/12MM W/ Roller Bearing

8mm 12mm 20mm Brake Service And Repair Flexible Ball End Honing Brush Ideal. Integrated concentric roller bearings stud extractors. 1/2" Drive 21mm Spanner or Ratchet 6mm, 8mm, 10mm and 12mm. It can also be used with 21mm spanners with the hex drives on the top of the socket.