Grover's Bronze Pro Hammered Triangles represent the collective experience of over 30 years of hand-crafting the world's finest triangles! BPH triangles are manufactured from a unique 1/2" diameter high-grade bronze alloy. Prior to bending, the solid alloy rod is meticulously hammered in a randomized pattern. This ensures that the inherent fundamental pitch is damped, and that the instrument's intricate and complex harmonic structure is enhanced. After fabrication, each and every triangle is hand tested and precision engraved with the Grover logo and a unique serial number. Grover's BPH Triangle is ideal for professionals and percussionists who demand an instrument capable of full expression and ultimate musicality. Includes zippered bag.