8 different styles and 8 different colors! We made it easy for you. Each expansion screw is color-coded. The colored plastic tab facilitates the mounting and snaps off after the appliance is ready. They are made of stainless steel to resist rust and corrosion. They are machined for an accurate fit of 0.1mm. The screws are clearly marked with arrows to show the opening direction. They come with a no-turn back, no slippage guarantee.