U-shaped metal device usually made of iron four sides of the U-shape, with rounded edges two holes at the top of the U-shape a nail hole at the bottom of the U-shape a nail hole at the top of the U-shape a wide opening at the bottom of the U-shape
horseshoe which has U-shaped metal device horseshoe which has usually made of iron horseshoe which has four sides of the U-shape, with rounded edges horseshoe which has two holes at the top of the U-shape horseshoe which is a nail hole at the bottom of the U-shape horseshoe which is a nail hole at the top of the U-shape horseshoe which is a wide opening at the bottom of the U-shape