Steeda Stainless Steel Brake Sleeves Replace the Rubber Retaining Pin Insulators on Mustangs. These Steeda Brake Sleeves help to Prevent Brake Rotor and Pad Distortion and can Extend Pad Life. Better Control of the Caliper means more Stopping Power and Fewer Warped Rotors. You can make the Switch with Basic Hand Tools and Without Disconnecting your Brake Lines.