Francois Gauthier Antique Rock Grinder Training Spur - 1 1/4" band with stainless steel hand engraved trim and rope.  2 3/8" shank.  1 1/4" rock grinder rowel.  Provides  a very strong effect.  

Level Five Spurs - Moderate to Strong Effect. 

A Level Five Spur is designed only for experienced horses and should be used only by professional trainers.  Their rowels are very sharp and can cause injuries.  In generaly, they arenot permitted in the show arena and are not approved for competition by most horse associations.