Weiss Cannon Black5Edge is built around its defining feature: a pentagonal (five-sided) cross-section profile rather than the standard round geometry of conventional strings. Each of the five edges acts as a contact point that digs into the ball during impact, creating more grip surface and more aggressive snap-back than a smooth round string the result is substantially more topspin from the same swing.
The shaped profile places Black5Edge firmly in the spin-specialist category alongside strings like Luxilon Alu Power Rough and Babolat RPM Blast. Where smooth co-polys bite and release fluidly, Black5Edge grabs aggressively players with fast, heavy swings will notice the step-up in spin production immediately. The pentagonal geometry also creates a crisper, more direct contact feel compared to round strings.
At 1.25mm, the gauge is appropriate for the performance demands of the shaped construction thinner would reduce durability too significantly, and thicker would dull the edge effect. Tension maintenance is good for a shaped poly; it holds its response characteristics better than many budget pentagonal alternatives.
Black5Edge suits advanced players with developed topspin mechanics who want a string that amplifies their already-heavy ball. It is not recommended for beginners or players with arm sensitivity the shaped profile and polyester construction can feel demanding on the arm if the technique doesn’t support it. Sold as a single strung set.


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