Assembling projects perfectly square can be a challenge. The more parts you have, the more complicated it gets. Having a set of 3D Squares, $50 for four, is like having your woodworking buddy in the shop to help you. Just clamp the squares to each part as you're assembling, and your project will be dead square. The 3D Squares are milled from aluminum with a guarantee of being less than .002-in. out of square across the 6-in. length of the leg. Each leg contains drilled and countersunk screw holes in case you want to fasten the squares to a jig or fixture.
Jevons Tool Company, (913) 384-0023, www.jevonstoolco.com 3D Squares, $50 for four.