OUR SRT-FL-04 BRAZED CARBIDE WEAR PADS USE A LOW HEAD OR BUTTON HEAD CAP SCREW SCREW AND HAVE A HIGH MIRROR FINISH ON THE CARBIDE WHICH CREATES BETTER LUBRICITY SO YOU CAN ELIMINATE COATINGS. AFTER YEARS OF TRIALS AND TESTING WE HAVE OUR OWN PROPRIETARY CARBIDE BLANKS WE USE IN OUR WEAR PADS. TI-REX4 COATING CAN BE APPLIED FOR AN ADDED FEE.