The Latitude 64 Sinus is a unique putter with three raised grip strips along the flat top. These grip areas each have different textures, sure to provide the perfect feel for any player. While the Sinus is a terrible name for a golf disc, this is truly an excellent putter. The Sinus is an overstable disc good for approach shots as well as short putts, even in windy conditions. We have it in Latitude 64's Zero Line plastics. This soft rubbery blend provides a great feel and sticks well to chains. It is durable and very affordable.