These are PCIe- Riser locks that help prevent your riser from coming dislodged on your mining rig.They work with most motherboards.These can flex to snap into place and hold secure.They unsnap easily but it is recommended you use a small tool to pry them from the PCIe slot, as they can break given their size, please be careful when installing/removing them.Fasteners allow you to make a reliable fixed connection with the slot PCI-E x1-x16, ensure that the USB connector is fixed from the raiser side, make the cable management with the help.Locker for PCIE solt 1X small board buckle,Except for x16 metallized slotOn some motherboards.Type: PCIe Riser ClipModel Number: Riser RetainerColour:RedMaterial:plasticSize:23 x 21mmPackage Contents:12 x PCIE Riser2 x Vertical Mount Securing clipOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3cm.