Motorcycle Turn Signal Adapter Hardware Mounting Bolts For Harley CRUISER CHOPPER Mirrors Motorcycle Condition : New bolts , Comes in one PAIR ( left & right side) Material : High Quality Billet aluminum , Color : The same with pictures show Size :Mirror side thread: 8mm , Mount side thread: 10mm , bolts Length: 57mm For 8MM Custom Mirrors To Harley Davidson 10MM Thread Long bolts , This adapter mounting kits can turn signal side mirrors Fitment : For most Harley Davidson bikes