You want the best? Here it is! The 6" long Tru Bars that are truly precision instruments. Machined from tool steel then precision ground to be perfectly flat. Black titanium nitride plating provides a dull, flat finish, and Rockwell hardness of 72. The engraved 6cm line when aligning with the ski edge you can determine base edge bevels by measuring the gap between Tru Bar and ski base (see diagram A). Packaged in durable sheath.