Hello everyone. I have been working on some projects using alluminium cladding. Find the material in picture. Material thickness ia bout 8mm. it is made of inner plastic material with alluminium thin plate on its surface. the alluminum on the surface should be about 2mm. I am cutting this several time with my xcarve carve starter bits. I have broken all bits now. Can anyone suggest the bit that will do this job better? Please answer with a link to purchase the bit.