SWINGARM - FRAME AXLE WEAR WASHERS FOR THE 1977-1985 TWIN SHOCK MODELS. REPLACES PART # 16-10-621-01. MADE FROM TOUGH WEARING 304 STAINLESS STEEL. UP-GRADE OR REPLACE YOUR STOCK WORN OUT STEEL WASHERS DURING YOUR RESTORATION OR SWINGARM BEARING MAINTENANCE. SOLD AS A PAIR (2)