Hold skate securely on a stable surface such as a table or bench. Note:  When gripping the Pro-Filer during sharpening, do not press thumb or finger against the exposed diamond cylinder.  This free-floating cylinder is designed     to seat in a precise centre position in the cylinder saddle.  Side pressure could cause misalignment of cylinder to blade.

Place Pro-Filer on blade.  Hold arm in line with blade and stroke down  the centre.  Do not force side to side.  Apply light to moderate pressure stroking in both directions.  Gentle pressure is the most effective way to perform accurate blade maintenance with your Pro-Filer Diamond.

After 10 – 15 strokes (1 stroke considered up and down the blade), lift the Pro-Filer off the blade and rotate the stone slightly to expose a fresh surface.

(Optional)  When you determine you are half way through the sharpening process, turn skate around and stroke blade in opposite direction to assure balanced pressure on all parts of your blade.

Check for a burr by pinching blade and pulling toward the skating edge.  When a burr has formed on both sides of the blade you have restored hollow.

Side stone thoroughly, stoking firmly at least 8 to 10 times on each side.  Burr must be removed.