About This

• 【Ultra Affordable】Based on real user data, we’ve included the 6 most commonly used metric knurled nut sizes for 3D printers: M2, M2.5, M3, M4, M5, and M6. This kit also comes with an upgraded extended-tip heat set tool—perfectly compatible, Skip the hassle of buying tools separately; this one-stop solution checks all your boxes with just one purchase.
• 【Top-Tier Brass Quality】Made from premium brass, our heat set inserts and heat set tool offer exceptional thermal conductivity. The heavy-duty brass resists oxidation, corrosion, breakage, and deformation, outperforming flimsy alternatives that fail quickly. These inserts stay strong and reliable for years, ensuring rock-solid fastenings even in harsh conditions.
• 【Precision Design for Secure Grip】High-precision threading prevents slippage during installation, while 45-degree spiral knurling boosts torque resistance and tensile strength. The knurled exterior creates tight friction with plastic, delivering stronger holding power than straight-threaded inserts. Built-in guides eliminate the need for countersinking—just insert and secure for a firm fit.
• 【Clear Identification & Categorization】Each threaded insert size is stored in its own sealed compartment, so no more tangled messes. Paired with clear, easy-to-read size labels, you can grab the right one in seconds and store them neatly afterward. Keep your workspace organized, even with long-term, Even non-professionals can handle it with total ease.
• 【Universal Compatibility & Quality Assurance】Works seamlessly with all thermoplastics (PLA, PETG, ABS, PPS, PP) and diverse projects—from 3D-printed parts to automotive shells and laptop casings. Every piece undergoes strict quality inspections. Whether for electronics, toys, or furniture, these inserts deliver long-lasting, reliable retention. Buy with confidence!

Overview

• Material : Brass
• Fastener Type : Insert
• Thread Size : M2 M2.5 M3 M4 M5 M6
• Exterior Finish : Brass
• Color : brass color