Tommy Armour Impact Diamondback Putter

Diamondback is the odd name in a line that otherwise counts upward, and it belongs to the model sitting apart from the numbered putters. Right handed, black, with a milled striking surface and nothing set into it, which is the construction shared across the whole family.

What you're buying is that Impact face in a head carrying a name instead of a number, and a name usually signals a shape someone designed around a particular look over the ball. The numbered clubs are easier to pin down: the No. 1 is a blade, the No. 3 a mallet, both balanced flat and both offered in two lengths. Start with those if you want to know exactly what you're getting before you roll a putt with it.