Simply set it approximately, then fine-tune it with the micro-adjust screw. A full turn of the screw is 1/16", a 1/2 turn is 1/32", a 1/4 turn is 1/64", and anything less than 1/64" is kidding yourself. Anodized aluminum body and brass fittings.
A real plus is that the screw is tensioned by an integral spring to ensure that any vibration does not change the setting.
Made in Canada.