Can you spot something missing on Kapro’s Combination Square? Actually two things are missing. Notice there’s no channel running the length of the rule; it’s smooth and flat. You don’t need a channel because this square doesn’t have the usual thumb screw locking mechanism. Instead six rare-earth magnets hold the body where you position it.
Kapro etches the 12″ stainless steel rule with inch and metric scales in increments of 1/16″ and 1 mm, and because of the magnetic lock you don’t have slide the body off the end of the rule to switch scales. They make the body from heavy-duty cast zinc, mill it on five sides, and incorporate the standard spirit level. You don’t even have to search for a marking device since they include their Easy Grip stainless steel scribe which is always at the ready, stuck to the magnets in the body.
You can find the square for as little as $11 before shipping, plus Kapro throws in a belt holster for the price of purchase.