Use the Winterstieger Ski Man Diamond File Stone medium grit when tuning your ski edges. This 70mm edge file produces the best results when used wet and with a file holder or guide. This stone paves the way between rounds of coarse grit filing and fine grit stones. Remove burrs from your ski and snowboard edges while also giving them a nice polish. This strong file body resists flex and lasts longer, thanks to the innovative European design. The Ski Man Diamond File Stone produces a professional race quality ski tune.