A set of angle blocks for setting up machine tools. Mine are lasercut from 1/8" acrylic, but you could mill them from a more sturdy material. The angles won't be as accurate as precision-ground angle blocks, but these are way cheaper!

Includes 1, 2, 3, 4, 5, 10, 15, 20, 25, and 30º angles, which can be combined to make any angle in between.