Custom CNC Machined DOUBLE TUCKER 5-Axis Aluminum Component Custom 5-Axis CNC Machined DOUBLE TUCKER Precision Aluminum Component. Precision 5-Axis Machining on German HERMLE C42U. The DOUBLE TUCKER is a custom precision CNC-machined component manufactured directly from the customer's 2D engineering drawing and 3D CAD data. This component features complex 3D contours, curved surfaces, multi-angle features, precision mounting holes and a long, relatively thin structural