High-quality material The screws are made of GR5 aerospace grade titanium, offering light weight, excellent corrosion resistance, rust resistance, durability, no deformation, and high break resistance. Titanium alloy is about 45% lighter than steel, harder than aluminium, and its overall performance surpasses other metals. This makes it a strong choice for upgrading bicycles, cars, and motorcycles. Specifications Class 5 Bicycle Stem Screws Head: Tapered Type: Hex Socket, Taper Head Screws Lightweight, No Rust Size: M4 titanium conical hex socket bolt, thread pitch 0.7 mm Hex key size: 3 mm (DIN912 standard) Package Content: 5 x Titanium Hex Socket Cap Screws with Taper Head Advantages Tapered titanium screws manufactured to high quality standards Titanium alloy offers low density and high strength, making these screws lighter and more durable than iron or stainless steel Extremely high corrosion and oxidation resistance, with high tensile strength and rigidity GR5 titanium provides durable, corrosion resistant performance that remains reliable in demanding conditions Wide application M4 bicycle stem screws are suitable for road bikes, mountain bikes, motorcycles, bicycles, racing cars and cars Practical accessories for attaching stems, bottle holders, derailleur handles, and seatpost clamps Use scenarios - Upgrading a road or mountain bike stem: replace existing hardware with these lighter, stronger tapered M4 screws to reduce weight and increase durability. - Replacing bottle holder screws: install in road bikes, mountain bikes, or motorcycles where corrosion resistance in wet or salty environments is beneficial. - Securing small components: use for seatpost clamps, derailleur handles, or other accessories on bicycles, motorcycles, or racing cars that require M4 tapered hex socket screws.