LIBRA 12" X 2" trailer brake shoes replacement kits (2 pairs) - 21029/21042 New Libra 12" X 2" electric trailer brake shoes with linings for replacement works with most 12"X2" electric trailer brake in the market Includes:2 pairs of shoes for 2 brakes/1 axle; 4 hold down springs, 4 hold down pins Replace Dexter Part# K71-127-00 (040-215/040-216)