1.Highquality material: the titanium screws are made of highquality GR5 aerospace grade titanium, which has excellent properties such as light weight, corrosion resistance, rust resistance, durability, no deformation and not easy to break. Titanium alloy is 45% lighter than steel, harder than aluminium and its performance is far better than other metal materials. It is a good choice for modifying bicycles, cars and motorcycles 2.Specifications Class 5 Bicycle Stem Screws; Head: Tapered; Type: Hex Socket, Taper Head Screws; , No Rust. Size: M4 titanium conical hexagon 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 3.Advantages: these tapered titanium screws are manufactured to high quality standards. Due to the low density and high strength of titanium alloy materials, titanium hex screws are lighter and more durable than iron or stainless steel and have high corrosion and oxidation resistance as well as high tensile strength and rigidity. GR5 Titanium is a high quality corrosion resistant metal that is more durable than other bolts on the market. 4.Wide application: M4 bicycle stem screws are suitable for road bikes, mountain bikes, motorcycles, bicycles, racing cars and cars and are practical accessories for attaching stems, bottle holders, derailleur handles and seatpost clamps.