No screw or screwdriver is required. This m.2 enclosure is lightweight, luxury and compact. You could easily pull the back-shell off or put it back with your hand. It ONLY supports M KEY and B & M KEY SSD with size 2280. With aluminum alloy material and waved hollowing outer casing, this SSD enclosure has a great heat dissipation, long-lasting performance. Additionally, this nvme enclosure coms with a thermal pad for better heat dissipation. This 40Gbps m.2 nvme ssd enclosure features wtih smooth top and bottom surfaces, which will appropriately prevent scratching the surface contacted, provide you a nice experience. Our 40Gbps nvme enclosure is fully compatible with USB4.0 and downward compatible with USB3.2/3.1/3.0/2.0. The enclosure speed test for the Samsung 980 PRO 250GB is 2805mb/s for read and 2734mb/s for write. Our NVMe enclosure comes with a 19.7 inch USB C to C data cable. It is compatible with Windows 7 or higher, Mac OS 10.3 or higher and Linux system.