Taking measurements of angled parts and measuring specific angles for different parts can be challenging. Given the difficult nature of these tasks, using sine bars and sine plates to complete these tasks makes them much easier. However, the process of utilizing sine bars and sine plates can be complex and does involve a certain amount of calculation. Keeping all of this in mind, using these tools can be highly accurate, but you need to know what you are doing. The sine values between different angular measurements can change at a rapid rate when at low values and change very slowly when at high values. Due the this, the accuracy that is achieved varies accordingly depending on the angle you are measuring. The degree of accuracy and precision that you are able to have when using sine bars and sine plates is much higher when working with shallower angles than when working with steeper ones. One tip to help address this difference is to use the complement of the angle (90° – x) when doing calculations for angles that are greater than 45 degrees. Overall, the accuracy of sine bars and sine plates is limited due to the complex number of elements involved in completing a measurement and the degree of experience you have with calculating the final measurements. However, these are excellent tools that are indispensable when working with the already complex issue of angled workpieces.