Kapro's 325 Magnetic Lock Combination Square allows you to work quickly and conveniently with it's magnetic adjustments. Its easy to read vial ensures level and aligned measurements every time. The magnetic lock adjustment further enhances convenience, securely holding the blade in place for consistent accuracy. It has a stainless steel blade that comes with permanently etched ruler markings in inches and centimeters, allowing you to switch between measurement units efforlessly. With 5 milled sides, this combination square offers superior accuracy for all your layout and marking needs. The combinations square's heavy duty cast zinc body ensures durability and longevity.