Flip type back spot face tool A flip type back spot face tool is a machining tool used in manufacturing and metalworking. It's designed to create a spot face or a flat, accurately machined surface on the backside of a workpiece. The "flip type" typically refers to a tool that can be flipped or rotated to perform this operation on both sides of the workpiece without removing it from the machine. This tool is often used for precision operations in applications where both sides of the workpiece need to be spot-faced with tight tolerances. It can save time and improve accuracy in machining processes.