✔ 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 ] ------------[ Total Length ]
M5 x 20-----------20 mm
M5 x 25-----------25 mm
M5 x 30-----------30 mm
M5 x 35-----------35 mm
M5 x 40-----------40 mm

[ Package Contains ]
M5 x 20--------10 Pcs
M5 x 25--------10 Pcs
M5 x 30--------10 Pcs
M5 x 35--------10 Pcs
M5 x 40--------10 Pcs
Hex Key -------1 Pcs

[ 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