- Sine bar used for measuring and setting angles
- It has two hardened steel rollers of equal diameter fastened near the ends
- The axis of rollers are mutually parallel and the centers of these cylinders are on a line exactly parallel with the working face of the base used on surface plate in conjunction with a set of slip gauges.
- Used for Precision measurement, setting of angles
- Made from high quality alloy steel
- Accuracy for Squareness