Aluminium Ruler + Knife Angle FinderA desk ruler and angle finder in that sweet, sweet 6061 Aerospace Grade Aluminum? Ohhhh yeah!! This is the perfect tool if you need to find the angles of your knives before you begin sharpening. Features metric and imperial measuring scale with knife edge angle finder, perfect desk and knife maintenance accessory! Imperial and metric measuring scale to 6" 15cm Grind angles: 15, 20, 25, 30, 35, 40 Lanyard hole 6061 Aerospace Aluminium