FORD:   packaged assortment, No. 5-1/2 x 9/16" and 15/16" lengths, oval head rivets for heavy sections. MASSEY FERGUSON: Packaged assortment of 66 rivets. 9/16" & 15/16" lengths, #5-1/2 oval head section rivets. For heavy sections. JOHN DEERE:   packaged assortment of 66 rivets. 10 - RIV103, 56 - RIV 101 rivets for heavy sections in each bag.