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. User feedback from previous purchases 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 positively impacts 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 helpful 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. In drums, one reason why vintage instruments like 60s Super Ludwigs and Radio Kings are favored is thought to be the 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, due to the global price increase of copper, the main raw material, we are unable to offer a price reduction. Please note that this product is made to order after purchase, so it takes time to ship. Thank you for your understanding.