Highly-effective DIMM (Dual In-line Memory Module) installation tool. If you need to insert a lot of DIMMs, save your fingers from pain by using this tool. It also helps you insert modules straight and evenly. Compatible with 133.5mm (5¼ inch) long memory modules which includes DDR2, DDR3, DDR4, and DDR5 desktop and server DIMM. IMPORTANT: The tool overlaps 1mm from the top edge. Please make sure your modules don't have any components within 1mm from the top edge of the PCB.