The BBB Cycling 90 mm Adjustable Handlebar Stem Stainless Steel Bolts -40° - +40° Angle and 31.8 mm Center Diameter 6061 T6 Aluminum HighSix OS BHS-29 is a versatile and durable tool for any cyclist or mechanic. This set of stainless steel bolts offers a wide range of adjustability, allowing you to customize the stem length to fit your specific needs. The 40° - +40° angle ensures a secure and comfortable fit, while the high-quality aluminum construction guarantees strength and durability. The 6061 T6 aluminum alloy provides a perfect balance between weight and strength, making it an excellent choice for both amateur and professional cyclists. With a 31.8 mm center diameter, it ensures a smooth and precise fit, reducing the risk of looseness or damage. This product is designed to enhance your cycling experience, making it a must-have for any avid cyclist or mechanic.