Ultra Grip SS Spurs with Balkenhol fastening 30 mm roundedNeck size measured from boot 45 mm Spur rowel Rowel 004 rubber colour black with 9 point big rowel rubber covered spur for a better fit and an attractive look reliable protection of the boot leather unique fit and design, can be adjusted to the foot by bending intelligent spur strap loop for a perfect fit on the boot made of break proof, high quality stainless steel