Compound Tolerances: Compound tolerance is the final tolerance calculated immediately after adding or subtracting the tolerances of different Proportions that make up a part. The holes can be for parts assembly or aesthetic needs. CNC drill presses can develop various-sized holes by varying the dimensions on the drill bit. https://cnc-machines-for-sale90909.tribunablog.com/the-2-minute-rule-for-kovosvit-mas-used-equipment-47324446