Active USB Hub, WLXKJY Aluminum 10-Port USB 3.0 Hub with 10 USB 3.0 Data Transfer Ports, USB Splitter with Individual Switch and 60W (12V/5A) Power Adapter bee it's normal because of grinding

it's normal because of grinding process

Metal forged coin with Soft Black Enamel with meticulous crafted Gold Plating to result in a highly aesthetic appearance…coaches and players know you mean business

and with CW/CCW by switch control (switch not included)

Simply drill a hole and install with nut and washer

Active USB Hub, WLXKJY Aluminum 10-Port USB 3.0 Hub with 10 USB 3.0 Data Transfer Ports, USB Splitter with Individual Switch and 60W (12V/5A) Power Adapter bee it's normal because of grindingActive USB Hub, WLXKJY Aluminum 10 Port USB 3. 0 Hub with 10 USB 3. 0 Data Transfer Ports, USB Splitter with Individual Switch and 60W (12V 5A) Power Adapter Product Features 10 Ports USB 3. 0 Hub for Charging and Data TransferUSB 3. 0 hub with 60W(12V 5A) power adapter is comparable to the traditional USB 3. 0 charger. During data transfer, the hub can also charge your USB device (ordinary charging speed). The USB splitter also expands the computer's