✔ Meets/exceeds: DIN 7991
✔ Screw Head: flat head, known as countersunk head, countersunk angle: 90 degree ; screw drive style: internal hex drives , known as hex socket drives
✔ Material of Screws : stainless steel 304, high strength and anti-corrosion in various environments
✔ Material of Hex Key : chrome-vanadium steel, nickel plated
✔ Easy to store: These screws and hex key come in an easy-use separated girds storage case

[ Sizes ]----[ Thread Length ]-----[ Total Length ]
M3 x 30 --------28.3mm------------30mm
M3 x 35 --------33.3mm------------35mm
M3 x 40 --------38.3mm------------40mm
M3 x 45 --------43.3mm------------45mm
M3 x 50 --------48.3mm------------50mm

[ Package Contains ]
M3 x 30-------20 Pcs
M3 x 35-------20 Pcs
M3 x 40-------20 Pcs
M3 x 45-------20 Pcs
M3 x 50-------20 Pcs
Hex Key -----1Pcs

[ About Internal Hex Drives ]
Internal Hex Drives, also known as Hex Socket Drives , have a hexagonal hole in the center that requires an Allen key, also known as a hex key or Allen wrench
[ About Flat Head ]
Flat head screws are designed to fit flush to the surface when used with countersunk holes