Whitz Racing Products Multifunctional Aluminum Screw Tray. Stop guessing screw sizes and keep your hardware in one place. No more, "This is a 4mm, no 5mm, probably 3mm why does it look like a 6mm". Constructed from CNC-machined aluminum and measure screws from 3-16mm, and diameter from M2.2-M5 in metric measurements, as well as SAE diameter from 2-56 to 10-24 with etched (#FlyTheW) and Whitz Racing logos for added style, this tray is a must-have convenient piece of art! Package includes one aluminum tray.