Unicorn Drive in studs/plug for traction. These studs are designed and manufactured in Canada with tungsten inserts for great wearability. They are coated with yellow dichromate to prevent rust. UD-00000 is the smallest we carry. The UD-00000 and UD-0000 are popular for Standardbred racehorses.
Note: with drill bit sizing, there is a difference with 1/4" drill bits. Use the F 1/4" drill bit that is 0.257 diameter.