High performance, corrosion-resistant steel chainring bolts & nuts set with perfect hardness Type -A usually fits triple crankset; Type B fits most mountain bike with double crankset Type-C Fits for sing crankset PVC electroplate colorful coating makes it rustproof and dazzling Grooved anti-slip base and fine threads provides balanced force Specification: Material: Steel A Size: Heigh:17mm/0.67 inch ; Outer Diameter: 7mm/0.28 inch; Nut Height: 13mm/0.5 inch; Outer Diameter: 10mm/0.39 inch B Size: Heigh:10mm/0.39 inch ; Outer Diameter: 7mm/0.28 inch; Nut Height: 8.5mm/0.33 inch; Outer Diameter: 10mm/0.39 inch C Size: Heigh:8.5mm/0.33 inch ; Outer Diameter: 7mm/0.28 inch; Nut Height: 6.5mm/0.25 inch; Outer Diameter: 10mm/0.39 inch Package Includes:(6 Pack) 5 pieces Bike Chainring Bolts 5 Pieces Bike Chainring Nuts