When sourcing a Pan Brake Folder (also known as a finger brake), you must prioritize Maximum Bending Length and Bending Capacity (Gauge). Ensure the machine can handle the specific thickness of materials like stainless steel or aluminum, noting that stainless steel capacity is typically 2-3 gauges lower than mild steel capacity. Look for removable and interchangeable fingers of varying widths to allow for the fabrication of pans and boxes of different sizes. Additionally, verify the Maximum Lift of the Clamping Beam, as this determines the depth of the boxes you can create.