Combination Square Set with Protractor | Multi-Purpose Precesion Measuring Instrument

Graduated Rule (Blade): A stainless steel or hardened steel rule with a central groove that allows heads to slide and lock at any position. It typically features both metric and imperial scales.
Square Head: Features 90° and 45° reference faces. It often includes a spirit level for checking horizontal/vertical alignment and a removable scriber for marking workpieces.
Protractor Head: Equipped with a revolving turret graduated from 0° to 180° in both directions. It is used for measuring and laying out precise angles.
Center Head: Features two V-shaped arms meeting at 90°. It is used to quickly locate the center of cylindrical or square stock.