The SX-8 series of horseshoes are 5/16" thick with graduated widths. These shoes are used for trail, jumping, dressage and ranch work.   They are available in clipped or unclipped.

New In 2020: SX-8 Select Hind Shoe
The Kerckhaert SX-8 Select Hind unclipped is based on the popular DF Select Hind, but specifically designed for horses used in Western disciplines requiring extra support. The heels are elongated and tapered. The widest part of the shoe is moved forward, allowing for extended heel fit.  They are unclipped and symmetrical.  Made in Holland. Punched for 5 City, 5 Slim, and 5 Combo Slim nails.