Turn the handle to switch the magnet on and secure steel parts—no need for clamps or screws. Use these plates with gauge blocks to tilt the plate surface to a precise angle. Measure angles on your workpiece or set up a part for precision grinding. Do not use for milling and drilling machine processes.

Don’t let one bad angle spoil the bunch. Individually crafted in the U.S. with Grade 8 Steel that lasts a lifetime, these are the most accurate and durable sine bars available. Machinists use them to guarantee consistency in mass production and to create tools like dies and knives. Ideal for small workpieces such as milling cutters, they’re best for angle measurements below 45°. Sine bars need to be paired with gauge blocks (sold separately).

Ensure accurate right angles and hold workpieces and fixtures perpendicular to a machine table by securing them to these plates with clamps.

The handle extends the full length and height of these plates for use on any of their six sides. Ensure accurate right angles and hold workpieces and fixtures perpendicular to a machine table by securing them to the plate with clamps.