Fig. 2: Digital scans of the two tools used for data collection.
From: Data-driven ergonomic risk assessment of complex hand-intensive manufacturing processes

3D scans of the Stringer tool (a) and Convex Mold tool (b) show the difference in geometry between the many concave rows of the Stringer and the convex curvature with varying radii along the length of the Convex Mold Tool.