You know it as the 'bowtie' lug. The Ludwig P2234B Twin Lug Casing fits USA Metal Beaded Snare Drums and fits over the bead. They're commonly found on Acrolite snare drums, and allow you to replace a broken lug casing or swap out the ones you have for some classic Ludwig style. • MFSKU P2234B • UPC 641064141072