1.Standard Metric: Our M3 / M4 / M5 / M6 Socket Head Button Screws adopt standardized metric system. And the average tolerances can be accurate to 0.01mm.
2..High Quality: The screw is made of high quality 304 stainless steel, which features is strength and offers good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas. Stainless steel with superior rust resistant ensure long lasting results, corrosion resistance, durable, good toughness.
3.Broad Application:M3 / M4 / M5 / M6 Socket Head Button Screws serves a wide range of use and for professionals, amateurs, landlords, repairmen, other DIY .
**The secret to not buying the wrong screw, use standard calipers for measurement & DO NOT use general rules and tape measures to measure.**