Thank you for viewing. This product is cast without burrs, with chamfered inner and outer edges, a polished finish on one side, and a hairline finish on the other. The direction of installation allows you to optionally select the loosening prevention effect. It can be used on snare drums, toms, and bass drums. User feedback from previous purchases includes: ① Improved clarity and sharpness, resulting in better sound quality. ② Pleasant overtones, making the instrument body resonate more. ③ Added beautiful high frequencies, resulting in usable sound. ④ The high density and mass of the washer body has a positive impact on the sound. ⑤ Open & closed rimshots feel great. ⑥ The "stickiness" of the material makes it difficult for the tension bolts to loosen, even with hard hits. ⑦ Compared to brass washers released by multiple manufacturers, the build quality is the best. ⑧ It's great that it also supports the diameter of the minus-head bolts and rods of Sonor drums. Brass has excellent acoustic properties and is used in guitars and basses for sustain blocks, saddles, bridge bodies, pegs, nuts, etc. Looking at drums, one of the reasons why vintage instruments like 60s Super Ludwigs and Radio Kings are favored is the imagined influence of brass hoops and washers on the sound. If you are dissatisfied with your drum sound, you can definitely feel the change more easily and reasonably than replacing the hoops. Currently, we are unable to accept requests for price reductions due to the global price increase of copper, the main raw material. Thank you for your understanding.