Sparx Blade Holder Size:OS The mid shaft is a

The mid shaft is a rounded convex back side

On the inside is high-density foam

memory foam-like

HingeFlex is the upper shell cuff of the boot that moves with your ankle when you move

While it has a narrower profile

Sparx Blade Holder Size:OS The mid shaft is aIf you're the type to carry extra steel, this may become your favorite Sparx accessory. A twist and a click and you're ready to sharpen your spare blades without the hassle of having to install them on your skate. Specs Compatible with: Bauer LS2, LS3, LS4, LS5 (regular & Edge), Most CCM Reebok Replacement Steel, Step Steel. NOT compatible with TRUE SHIFT Holder Steel use Goalie Sled Holder 13" x 2" x . 5"