Graf's exclusive holder mounting system. Male bolts that go through the holder and thread into the female end that are secured into the inside of the boot to mount the skate holders onto the boot.
Female ends available below.
Short - these are 13mm long threaded with thread lock pre-dipped. Short bolts tend to be used in the entire front portion of the holders. (Not the heel)
Long - these are 15mm long threaded with thread lock pre-dipped. Long bolts tend to be used in the heel portion of the holders. (Not the front, they will be too long and protrude through to far and hurt your feet!)
Both the long and short use a torx drive head screw. Use the right tool to install! 6 point star.