Callaway Odyssey Metal-X Midsize Mallet Putters Headcover, Silver/Black, Heel/Center Shaft Designed for Metal-X midsize Mallet Putters. Covers Odyssey Metal-X Midsize Mallet Putters and all other mid-size mallet Putters Tour-inspired looks. With ODYSSEY logos. Synthetic PU Leather. Velvet Lining. Magnetic locking device. Inner Size: 120mm x 70mm x 30mm (wide x deep x height) Works on both heel shaft and center shaft putters