Attach to High-Accuracy Combination Square Blades with the included lockbolts.

Square head checks 90° angles.

Center head identifies the center on pipes, rods, and shafts.

Protractor head measures angles.

Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads. Hardened cast iron heads are more durable and last longer than cast iron heads.

Use these squares in place of your try square, miter square, depth gauge, height gauge, center-point finder, and level. Blades are labeled with numeric increments that are less than 1" for quick reading. All have a corrosion-resistant satin-chrome finish that reduces glare and wear-resistant etched markings.

Square head checks 90° angles. Center head identifies the center on pipes, rods, and shafts. Protractor head measures angles.

Hardened cast iron heads are more durable and last longer than cast iron heads.

Built for welding and other heavy duty fabricating jobs, these squares have an extra-wide head and a large thumbwheel, so they’re easy to adjust and hold while wearing gloves. They combine the functionality of a try square, miter square, depth gauge, marking gauge, 90° level, and ruler in one tool. Add a clamp to the extra-wide head or use the included leveling tabs to hold material while welding. The tabs can also be used to set workpieces level to one another before fabricating. The fully recessed blade makes it easy to measure around obstacles.

Squares with a cast iron head are durable and resist both scratches and dents. However, they’re more prone to corrosion than squares with zinc heads.

A titanium coating protects the blade against scratches and wear. Use these squares to replace your try square, miter square, depth gauge, height gauge, center-point finder, and level. Blades are labeled with numeric increments that are less than 1" for quick reading. All have wear-resistant etched markings.

Square head checks 90° angles. Center head identifies the center on pipes, rods, and shafts. Protractor head measures angles.

Position your workpieces at the correct angle prior to welding. These squares have an extra-wide head, so you can clamp them in place.

2-axes squares set workpieces at a 45° or 90° angle. All have leveling tabs to ensure workpieces are aligned with one another. Those with joint access cutouts make it easier to reach joints, such as when welding and gluing.

3-axes squares set workpieces at a 90° angle along 3 axes at the same time.

Cast iron squares are scratch- and dent-resistant for durability. However, they are more susceptible to corrosion than aluminum.

For technical drawings and 3-D models, click on a part number.

Adjust a surface into a level position on multiple planes.

Two-plane levels have two vials set at 90° angles to allow you to level in two directions simultaneously.

Check the accuracy of horizontal and vertical surfaces with these precision-machined levels. They have two highly sensitive vials set at 90° angles for checking two planes at the same time.

V-groove provides stability on curved surfaces.

These levels come with a calibration certificate traceable to NIST that states they've passed a test for accuracy. They are precision-machined and check the accuracy of both horizontal and vertical surfaces simultaneously with two highly sensitive vials set at 90° angles.

V-groove provides stability on curved surfaces.