To elevate MOI over the Sigma 2 Fetch, which has steel bordering the center cutout, designers used aluminum here, then steel in the heel-toe ballasting for increased forgiveness. The color contrasting helps you focus on the alignment lines, causing the holed-out section to fade and not be the primary focus.
At address, the ratio of aluminum to steel appears to be 50/50; in fact, steel accounts for 2/3 of the weight, created by a thick back flange, resulting in a lower, much deeper CG and a higher MOI.
Bearing the same heel-toe weighting that helped make the original Anser 2 so popular, the Heppler version also shares the original’s angled heel ballast. The all-steel Heppler Anser 2 stands apart with color blocking that creates its own eye-pleasing alignment assistance.
The strong-arc mallet is enjoying popularity, and the Floki expands a player’s fitting options while boasting the second-highest MOI in the Heppler line, owing to its 2/3 steel, 1/3 aluminum construction. Significant steel around the perimeter prevents twisting and its copper color contrasted against the black aluminum is designed to inspire confidence.
If you prefer a center-shafted putter you'll find the Piper C gives you a performance edge. Relative to other center-shafted models, the CG is lower, and MOI is higher because of steel heel and toe weights integrated with the aluminum body.
Airport runway lights inspired the alignment dots in the highest-MOI model in the Heppler family. The dots get closer together front to back to simulate motion, help with eye tracking, and frame the ball. The back ballasts are cored out and steel filled in this ½ steel, ½ aluminum putter.