While we prefer and recommend the edge leading stroke (downward stroke), both leave great results and whichever one feels right to you is the best option. Our sharpeners allow for flexibility in terms of stroke direction. We originally used the edge trailing stroke (upwards) but after several years of testing, learned that edge leading strokes (downwards) created a slightly sharper, more durable edge. The edge leading stroke is also safer, ensuring the users hand is clear of the blade at the end of the stroke as the stone passes the tip of the blade.