These are the Factory Team M4 Locknuts. FEATURES: Used in the assembly of the Team Associated ProLite 4x4, ProRally, RC10B5, RC10B5M and TC6.2 May also be used in any application requiring this size of locknut Steel construction with nylon insert Knurled back section for sure grip YOU WILL RECEIVE: Eight Factory Team M4 Locknuts REQUIREMENTS: 7mm Wrench, or Nut Driver jxs 10/16/14 ir/jxs &