LIBRA 10" X 2-1/4" trailer brake shoes replacement kits (2 pairs) - 21028/21042 New Libra 10" X 2-1/4" electric trailer brake shoes with linings for replacement works with most 10"X2-1/4" electric trailer brake in the market Includes:2 pairs of shoes for 2 brakes/1 axle; 4 hold down springs, 4 hold down pins exchange with Dexter brake parts# K71-047-00 (040-017/040-021)