New and improved version...Through years of research, testing several different heights of holders, the unanimous consensus was that the optimal change for the new TUUK Lightspeed was an overall height increase of 3mm at the front and back. By doing this, the holder will deliver an optimized push off angle for improved acceleration, allowing the player to get lower to the ice without grounding out and will permit the player to perform sharper, tighter turns. The LIGHTWEIGHT CAVITY TRUSS design provides an unsurpassed feel by delivering the optimal balance of spring and torsional strength. Does not include stainless steel runner.