The Big Bertha Spike by Callaway Golf brings "state of the art" traction technology to the golf consumer. Unlike traditional plastic golf cleats, the Big Bertha Spike's oversized, asymmetrical design provides more power and performance while playing. The lightweight dual density construction also gives the golfer increased durability, comfort and traction under most surface conditions. The Big Bertha Spike is specifically designed for maximum performance to fit the complete range of Callaway Golf Footwear.