In addition to all of the same great features of the regular Liberty nail Liberty Cu horseshoe nails include Copper (Cu) Shield Technology. This technology provides much more protection than traditional horseshoe nails. Hoof wall, white line and sole are stronger and healthier when Liberty Cu nails are used on a daily basis. The Copper(Cu) Shield Technology is unique to Kerckhaert and Liberty Cu horseshoe nails.
 
Nails with the City designation were once the most commonly used nail and still hold a substantial share of the market. The blades are slightly larger in dimension to provide more strength and durability. Most of the American style shoes in the market are punched for 5 City and 5 Slim.