12" X 3/8" 8 On 7 Wave Rotornew Wave Rotor 3/8In X 12.00 Slotted (8 Holes)Bert New Wave Rotor 3/8" X 12.00 Slotted (8 Holes) Front Nym 544-2 - Bert Engineering Is Offering An Interesting Alternative To The Times Spent Of Safety Wiring Your Rotor Bolts. The Answer Is The Nord-Lock. This Unique Securing System Used Tension To Make The Bolt Self Locking From Cold To Hot And From Hot To Cold Your Rotor Will Not Loosen.