✔ Meets/exceeds: ISO7380 912, DIN934
✔ Material of hex key wrench: chrome-vanadium steel, nickel plated
✔ Material of screws and nuts: stainless steel 304, high strength and anti-corrosion in various conditions
✔ Screw head : button; screw drive: hex socket , known as internal hex drives
✔ Easy to store: these screws , nuts and hex key wrench come in an easy-use storage case
Item-------Thread Length-------Total Length
M3 x 6 -------6mm/0.24" -------7.6mm/0.30"
M3 x 8 -------8mm/0.31" -------9.6mm/0.38"
M3 x 10-------10mm/0.39"------11.6mm/0.46"
M3 x 12-------12mm/0.47"------13.6mm/0.54"
M3 x 14-------14mm/0.55"------15.6mm/0.61"
M3 x 16-------16mm/0.63"------17.6mm/0.69"
M3 x 18-------18mm/0.71"------19.6mm/0.77"
M3 x 20-------20mm/0.79"------21.6mm/0.85"
M3 x 25-------25mm/0.98"------26.6mm/1.05"
M3 x 30-------30mm/1.18 ------31.6mm/1.24"
M3 x 35-------35mm/1.38"------36.6mm/1.44"
Package Contains:
M3 x 6--------40 Pcs
M3 x 8--------40 Pcs
M3 x 10-------40 Pcs
M3 x 12-------40 Pcs
M3 x 14-------40 Pcs
M3 x 16-------30 Pcs
M3 x 18-------30 Pcs
M3 x 20-------30 Pcs
M3 x 25-------30 Pcs
M3 x 30-------30 Pcs
M3 x 35-------30 Pcs
M3 Nuts-----180 Pcs
Hex Key Wrench---1 Pcs
Total: 561 Pcs
About Hex Socket Drives:
 Hex socket drives, also known as internal hex drives, have a hexagonal hole in the center that requires an Allen key, also known as a hex key or Allen wrench
About Button Head:
 Button head is similar to standard pan head screws but have a curved top.