The Bionik 700 series putters comprise of a multi-material construction to provide exceptional results. A heavy metallic frame surrounds an integrated lightweight TPU insert. The latter pushes weight away from the center of the head for enhanced perimeter weight and added forgiveness. The TPU insert serves double duty as well. Part of the T-shaped insert forms the soft face insert for a muted feel and sound at impact. The main body you see at address acts as an effective orientation guide with bold sight lines directed toward your target.