The Bridgestone Golf TD-03 True Balance Putter has a dual layer grooved insert. True Balance technology moves the balance point of the club down the shaft to near the head. Moving it down so far provides better feel for the action of putting. More of a pendulum like swing, which is the action that you want when putting. Keeping your arms straight and rotating your torso to more accurately maintain the face angle of the putter from address to impact and beyond.
With the stainless steel construction you would think that it would be too solid at impact. However, the dual layer grooved insert provides a softer feel and better feedback. More control on long putts and more consistent strikes. The True Balance technology assists in getting the ball into a true roll almost instantly after impact. Getting the ball into a true roll sooner reduces the skidding effect of the ball on the grass. Which makes the ball track more accurately and consistently on the line you hit it on to the hole.