Product Overview:- Wil-Wood’S Dynamic Mount Rotor Bolt Kits Contain Bolts And Hardware For Dynamic Mounting For Specific Hat Or Rotor Adapters.Product Info:- Wil-Wood Rotor Bolt Kit - Dynamic Front 12 Bolt With T-Nuts- Type: Bolt Kit-Rotor- Material: Alloy Steel- Grade: Grade 8- Bolt Qty: 12- Head Type: Socket Head- Drive Type: Hex Drive- Length: 1.000- Thread: 1/4-20Manufacturer Part Number:- Part Number: 230-4900Specifications:-Bolt Kit-Rotor DescriptionType: Bolt Kit-RotorMaterial: Alloy SteelGrade: Grade 8Weight (Oz): 0.400Bolt Qty: 12-ShapeHead Type: Socket HeadDrive Type: Hex DriveLength: 1.000Thread: 1/4-20-DimensionsThread Size: 1/4-20Lock Wire Drilled: N