【High-Quality Screws】- All computer screws are made of high-quality carbon steel, with clear threads and accurate dimensions. The surface of the computer screws is zinc-plated for high brightness, good color and rust resistance for long-term use. Each product is tested more than 5 times before sale to ensure firm installation when used. | 【Most Popular Sizes】- LuKaiSen 350 PCS Computer Screw Assortment Kits professional includes 2 most popular sizes of brass standoff screw (M3x6+6 & M3x6+#6-32x4). The different screws can meet your different needs. These kits can be applied to 99.9% of computer cases. You no longer need to worry about the mismatch of the standoff screws you bought. | 【Best Computer Screws Kit】- LuKaiSen computer screw kits include 350pcs computer screws & gaskets (chassis fans screw kits, chassis screw kits, hard drive screw kits, standoffs screw kits, CD-ROM screw kits, 2.5’’SSD screw kits, chassis hand twist screw kits, main board screw kits, insulation gaskets). Completely re-engineered to provide all the tools that you need, and none that you don't. | 【Great for PC Screws Building & Repair】- LuKaiSen PC screws assortment kits is the best and perfect for the motherboard, SSD, hard drive mounting, computer case, power supply, graphics, computer fan, CD-ROM drives, DIY PC fixed installation or repair. Whether you are a professional or amateur in the IT world, you can easily use these PC screw assortment kits to repair or DIY computers and laptops. | 【100% Satisfaction Guarantee】- Quality problems within a 1-Year replacement, lifetime warranty. If you are not completely satisfied, please feel free to contact us, we will give you a 100% refund within 30 days of purchase. No questions asked!!!