Essential for repositioning blades. Small carbon bars: 2.5 mm in diameter and 12 mm in length. Useful for plugging the existing holes on the sole of the boot when changing the blade with a different model that requires a different size of screw. The diameter corresponds to that of the drill tip (mm 2.5) and they are the same thickness as the insole/sole (mm 12) To insert, use a set of pliers to hold the bar in place, and tap it into the hole, applying pressure with a hammer. The consistency of the material allows further drilling next to the bar and on top of it. Pack of 20