The marks on the inside of the cover are the grinding tool clamping marks. It's normal

Product video introduction: video introduction：The V2 version has been improved as followsIncreased installation smoothnessRedesign and correct teeth to protect switch cover from clasp damage when opening switchThere will be a kitten cutout at the bottom to solve the problem of TTC, which is an alternative switch bodyCompared with the previous weight reduction, the wearer will not feel particularly heavy to increase portabilityProduct highlightsSelf designed property rights compatible with all kinds ofcherry similar and outemu similar switches.One piece design with clip on cover, cat face concept, more interesting, with rope buckle for easy carryingStrong and durable metal feel, optimized size, easy to open