In the present study, the performance of different Sandwich composite materials with different reinforcements and thicknesses was examined by using drills having different types and diameters. Three different types of drills, HSS, TIN and Carbide, were used in the drilling processes. Different types and different Sandwich composites were used as materials. As a result of the drilling processes, the surface roughness of the drilled surface, drilling performance, the quality of the hole, and different cutting parameters were examined depending on the rotation and feed rate. All the values obtained were transferred to the graphics and tables. In addition, photographs of all the samples were taken under an electron microscope (SEM) and the surface roughness in these photographs was examined.