Pro Grip Studs 
Self clearing studs. The studs are machined to push the dirt out of the stud hole as the stud is screwed in.
The PGS has a tungsten pin with a 6mm-16mm protrusion.
Ideal for use on hard ground or sometimes used as keepers.
Highest quality horseshoe studs used by some of the most successful equestrian competitors in New Zealand and internationally.
Suitable for 3/8" studs holes
Sold in a pack of 4 studs