The Flying Beetle Cutting Head is designed for use with the Beetle Bits Glass Cutting System and Waffle Grid (4 Pack). The cutting head is always at a 90 degree angle giving you a perfect score and glides effortlessly back and forth on the straight edge bar. It does not require oil, but the cutting head may be dipped into oil every few cuts if desired. Simply press down on the button to engage the carbide cutting wheel with the glass. The pointer is in direct alignment with the lines of the Waffle Grid system so you will know exactly where the scoring line is going to be.