Features1Strong Practicality: Bicycle chainring nut wrench is used to fix the stud from one side and remove the stud from the other side with an hex key. 2Practical Durable: Chainring nut wrench securely holds the slotted nut to prevent rotating when tightening or loosening the screw. 3Stainless Steel Material: Bicycle tooth disc wrench is made of stainless steel, which is strong, durable and rust proof. 4Easy to Use: Bicycle crankset wrench is easy to use without complicated steps and has a long service life. 5Scope of Application: Chainring nut wrench is practical, suitable for mountain road bikes, etc.SpecificationItem Type: Bicycle Tooth Disc WrenchProduct Material: Stainless SteelLength:Approx. 93mm / 3.7inInner Hole Diameter:Approx. 9mm / 0.4inApprox. 10mm / 0.4inPackage List1 x Bicycle Tooth Disc Wrench