Grover Pro Brass Tubular Triangle Beaters are designed to pull out maximum overtones from your triangle, topped with weighted, 2.25"-long brass alloy heads. The brass alloy is made to be extra-soft, reducing the amount of contact 'tick' to the minimum.
The 5/16" model is has a medium amount of mass, making it excellent as a go-to beater for all triangle parts.
The long 9-5/8" shaft can reach triangles (and other instruments) that are awkwardly far away, and they're coated in non-slip polymer to help you keep a confident grip even when things get tense.