Callaway's Odyssey White Steel Putter line features Dual Insert Technology. A milled stainless steel insert is surrounded by a responsive, modified White Hot insert to create the best of both worlds ' a groundbreaking combination of precision and feel. The revolutionary design of the Odyssey White Steel Putter line starts with Dual Insert Technology ' the seamless integration of a precision-milled, trapezoid-shaped stainless steel insert suspended in the centre of a modified White Hot urethane face insert. Odyssey's proprietary White Hot face insert is lightweight and highly resilient, allowing weight to be repositioned deep in the putterhead for greater resistance to twisting and increased stability on off-centre putts, with remarkably soft feel. The stainless steel insert is machine-milled for a consistent, flat surface that gives golfers improved roll and a unique, pleasing sound at impact. For each model in the White Steel Putter line, a highlighted alignment strip atop the putterhead features a brushed satin finish that help golfers square the face to target at address and focus sight for a pure stroke. All White Steel Putters feature a bright, distinct and identifying Odyssey Red Swirl grip from Winn. This grip is made from a soft polymer compound, combines secure control with the premium qualities of a wrapped grip, exceptional feel and a virtually seamless appearance, and a look that makes a bold statement on the green.