This well designed guide helps you accurately control the angle of the file as you sharpen. It has a rotating collar for setting a positive or negative rake angle up to 30°. The 75mm wide protractor helps set the fleam (or bevel) angle up to 45° left or right. The protractor is marked in 5° increments and the collar has a vernier scale marked in 1° increments. An O-ring inside the collar provides light resistance to the vernier scale making precision setting straightforward. It has an anodised aluminium body, stainless-steel protractor and brass thumbscrews. Its overall length measures 66mm. Made in Canada.