Mint Nike Method Core M11w Prototype Putter from the Oven. Putter has "The Oven" stamp on sole. This model was never released to the public and was only available to tour professionals. It has the milled face grooves which are far superior to the insert offered on the retail version of this putter. The putter is 34" in length and has a Superstroke Claw grip installed. A Method Converge Headcover will be included with this putter. Putter is in fantastic condition as you can see from the pictures.