M.Power's Combination 3D Square ($50) is a try square, marking gauge, and saddle square all in one. The pencil-holding marking gauge is easily removable, so it can be attached to a longer straightedge to use as a giant compass. A 2-inch-long wing below the body of the tool lets you mark around outside corners. Our favorite feature is the retractable foot that swings out in line with the blade. With the foot out, the square sits flat on the edge of a board without tipping or falling off. 613-525-3328, www.m-powertools.com.
