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.

Specifications
Hand: Right
Shaft Length: Adjustable-length shaft allows a custom fit from 32"-36"
Putter Type: Mallet
Head Weight: 365g
Stroke Type: Straight
Lie Angle: 20° ±2°
Loft: 3° ±3°