1.This link is only for the keyboard shell for Filco Cooler Master Quick Fire Stealth 87 Tenkeyless keyboard.No keyboard included.
When it's used for CM Quick Fire 87,there will be 2 holes useless.Pls check the photo we take with CM keyboard as below.If you can't accept it,pls not order it for your CM keyboard.For Filco,these 2 holes are used to shine Led through,however CM don't have that 2 led,so it's useless.
2.The keyboard case is made of aluminum CNC anodized.
USB Cable Detachable Module CNC Case 2xCNC Feet (Presented)
M2.5x6 is to mount bottom case to upper case
M2.5x4 is to mount USB module to bottom case
M2.5x5 with cap is to mount PCB to upper case
You can also see detailed size image to confirm whether it can use for your keyboard yourself