The Callaway Odyssey Crimson Series 550 Putter is a mallet putter that borrows from the design principles of the Rossie, one of the most popular Odyssey designs, and features the slant neck hosel and alignment lines that will be familiar to all devotees of the Odyssey range. The Odyssey Crimson Series makes the Tour standard design and quality of the Odyssey range available to all golfers. Crimson Series putters are made from 431 stainless steel with a Crimson Stronomic Insert. The insert produces a firm and resilient clubface that still provides wonderful sounds and excellent feedback. The face and insert of the Callaway Odyssey Crimson Series 550 Putter are ground together to remove any differences between the two surfaces and to provide the consistency that only a flush clubface can provide.