The Peterson Bump Hammer is designed without sharp corners to protect your fingers and thumbs. Additionally our narrow ergonomic handle and textured finish allow for a firmer, steadier grip. Our weighting holes mean you can also vary the hammer weight to create the performance YOU desire. Flexibility is one of the key factors in successful bumping. Some people desire the most flexible handle and least follow through possible. Many others prefer the harder strike of a firmer handle. For some, a moderately flexible handle, such as that found on our black hammer, is the best of both worlds. THIS BLUE HAMMER IS THE LEAST FLEXIBLE VERSION.