Just a washer, but a washer nonetheless... Please experience it for yourself. Thank you for viewing. This is an original bolt/rod washer, brand new, unused, 20 pieces, made in Japan. It's cast without burrs, with chamfered inner and outer edges. The front side has a glossy finish, and the back side has a hairline finish, allowing you to choose the loosening prevention effect depending on the direction of installation. It can be used on snare drums, as well as toms and bass drums. Representative opinions from users who have purchased this product include: ① Improved sound quality with better clarity and sharpness. ② Overtones became pleasant, and the snare drum itself resonated more. ③ Added beautiful high frequencies, resulting in a usable sound. ④ The washer itself has a high density and mass, which I believe has a positive impact on the sound. ⑤ The sound of open & closed rimshots is pleasing. ⑥ Due to the properties of the material, it's less likely for the tension bolts to loosen even with hard hits. ⑦ The best quality compared to brass washers released by multiple manufacturers in the past. ⑧ It also works with Sonor's minus-head bolts/rods, which is very convenient. 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 Supra-Phonics and old Radio Kings are favored is the influence on the sound due to the use of brass hoops and washers. If you are dissatisfied with your drum sound, this is a more affordable way than replacing the hoops, and you can definitely feel the change. Please note that we are unable to offer discounts due to rising prices and raw material costs. Thank you for your understanding.