2Pcs Hexagonal Crank Arm Fixing Bolts Metal Bicycles Crank Bolts Screws for Square Cranksets and Bottom Brackets

Steel. Make from Steel materials, it have good mechanical property, toughly, and corrosions resistance. High hardness tensile strength, low wear tear, Enduring reliable use. Suitable for installing middle axles of bicycles square hole. 2Pcs Hexagonal Crank Arm Fixing Bolts Metal Bicycles Crank Bolts Screws for Square Cranksets and Bottom Brackets. Features: Make from Steel materials, it have good mechanical property, toughly, and corrosions resistance. High hardness tensile strength, low wear tear, Enduring reliable use. Suitable for installing middle axles of bicycles square hole. Accurate and smooth tapping, easily installation. Suitable for installing the center axles of various bicycles, such as mountain bicycles, foldings bicycles. Specifications: Materials: Steel. Styles: about 8mmx15/10mmx14/12mmx14/15mmx15. Detail size as shown in the picture. Package Includes: 2Pcs Bike Hexagonal Crank Arm Bolts. note: Please allow 1-2cm errors due to manual measurement, make surely that you n