NTN Deep Groove Ball Bearings , 6820 Diamond Grip Pliers Screw Extractor 7mm Impact Socket 3450 8mm Size:SBTR 3015 X 7mm Impact Socket 3450 8mm Impact Socket 9mm Impact Socket 10mm Impact Socket 11mm Impact Socket 12mm Impact Socket 13mm Impact Socket 14mm Impact Socket 15mm Impact Socket 16mm Impact Socket 17mm Impact Socket 18mm Impact Socket 19mm Impact Socket 20mm Impact Socket 21mm Impact Socket 22mm Impact Socket 3 8" Dr Dimensions (mm) Model A B C D E F G H I 57F 65 41 but a specially designed lip on the edge of the seal prevents foreign matter penetration In addition to unsealed and unlubricated “open” bearings