The 440Pcs 304 Stainless Steel Slotted Spring Pin Assortment Kit is designed for versatility and durability. Crafted from high-quality 304 stainless steel, these spring pins are corrosion-resistant, anti-moisture, and resistant to oxidation, making them perfect for both indoor and outdoor applications. The pins also offer acid and alkali resistance, ensuring reliable performance in various environments. This kit contains a total of 440 pieces in 24 different sizes ranging from M1.5 to M5, including various lengths to meet a wide range of fastening and alignment needs. The spring pins are ideal for use as parallel pins or dowel pins, perfect for retaining parts in place, maintaining alignment, or joining components together securely. The practical packaging includes a durable, heat-sealed plastic box with a divided storage case to keep the pins organized by size. The box is labeled for easy identification and convenient storage, preventing any mix-ups. What?s Included: 440 pieces of slotted spring pins in 24 sizes: M1.5 (5mm, 8mm, 12mm, 16mm) ? 80 pieces M2 (5mm, 8mm, 16mm, 20mm) ? 80 pieces M2.5 (5mm, 8mm, 16mm, 20mm) ? 80 pieces M3 (8mm, 16mm, 22mm, 30mm) ? 80 pieces M4 (8mm, 16mm, 22mm, 30mm) ? 60 pieces M5 (10mm, 20mm, 30mm, 40mm) ? 60 pieces 1 clip for easy handling and use. Whether you're a professional or DIY enthusiast, this spring pin assortment kit offers the ideal solution for precise and reliable fastening.