The "comet" shaped opening hole is a trademark of the byrd line and is synonymous with the stringent quality requirements, high performance materials and manufacturing, which go into every knife. fully stainless handles have a sequence of ergonomic curves that fit into the palm for comfort and fatigue-free control while cutting. For additional safety, a portion of the lock release is ground away. This is a design add-on conceived by custom knifemaker David Boye and eliminates the chance of gripping the knife tightly enough to unintentionally release the lock. All byrds feature a pocket clip that clips the knife inside a pocket and it attaches to either end of the folder for tip-up or tip-down right-hand carry.