These were designed based on input from Sifu Carmelino Huang Guiao II and four other instructors from the Grandmaster William Cheung lineage. These weapons-grade trainers are the first butterfly swords (that we know of) expertly designed specifically for the Traditional Wing Chun lineage. They will stab, cut, and execute a back cut. The blade is Searle's bowie style in the format made popular and done so well by custom knife maker Bruce Bump. The D-Guard is an entirely new trapper design intended to improve both trapping and hand protection. Since these swords do not flip, there is no wasted space in the knuckle-bow. The butt is rounded and heavy steel to facilitate bashing. The ergonomic handle is straight to accommodate the back cut and percussion chops versus armor. The flat area underneath the choil was designed as a blade stop and actually curves forward in a manner integrated with the choil.