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, as well as toms and bass drums. Feedback from users who have purchased this product includes: ① Improved sound quality with better clarity and attack. ② Pleasant overtones, making the instrument itself 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 rim shots feel great. ⑥ The "stickiness" of the material makes it difficult for the tension bolts to loosen, even with hard hits. ⑦ The best quality compared to brass washers released by multiple manufacturers. ⑧ Compatible with the diameter of the minus-head bolts and rods of Sonor drums, which is appreciated. Brass has excellent acoustic properties and is used in guitars and basses for sustain blocks, saddles, bridge bodies, pegs, nuts, etc. In 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. It's just a washer, but it's more than that... If you are dissatisfied with your sound, you can definitely feel the change more easily and reasonably than replacing the hoops. Currently, we are unable to offer price reductions due to the global price increase of copper, the main raw material. Thank you for your understanding.