SEATPOST ACTION BINDER BOLT 19MM CRMO (SEAT PIN) by Action Go to amazon.com Related posts Best seatpost bolt for 2022 FeatureAction Recessed Allen Bolt - Chromoly, Allen bolt with anti turn key, three lengths. 19mm long Chrome each. DescriptionAction Recessed Allen Bolt - Chromoly, Allen bolt with anti turn key, three lengths. 19mm long Chrome each.