The PING Sigma 2 Arna Stealth putter is a brand new design and boasts some exciting new features to help you improve your putting. Read on to find out more about these flat sticks.

Dual-Durometer Face

PING uses 2 layers to make up the dual-durometer face, made out of a material called PEBAX. The outer layer is soft, like a pencil eraser, for a softer feel on short, delicate putts. The inner layer is firmer, like tire tread. This firmer layer gives excellent distance control on longer putts.

Adjustable Shaft

PING first brought an adjustable shaft to the PING Nome model. That iteration had its limitations that the engineers addressed in the Sigma 2 line.

Each putter in the line can be adjusted between 32 inches and 36 inches using system that's built into the shaft. Simply take the tool and turn it left (adding length) or right (shortening length). Each full turn equals 1/4" on length.

TR Technology

The face of the PING Sigma 2 putters have the company's patented TR technology, which stands for "true roll" technology. The grooves are cut to different depths, deeper in the sweet spot and shallower on the heel and toe. This variation of depth gives you more consistent ball speeds, helping mishits go a similar distance as pure strikes.

The PING Sigma 2 Arna Stealth putter is a heel-shafted mid-mallet with forgiveness on mishits and a single alignment aid on the back. It has a head weight of 360 grams, for a stable smooth stroke. The flow-style hosel of the Sigma 2 Arna is best for a slight arc putting stroke.

The chart below shows were the Sigma 2 putters fit in relation to each other.