ALL IN SIOUX STYLE VALVE SEAT GRINDER STONES 5 PCS KIT SATELLITE PINK 11/16" X 16 TPI THREAD VITRIFIED BOND FINISHING CUT WITH SIOUX STONE HOLDER 11/16" THREAD WITH STAR DRIVE  HEAVY DUTY, THREADED & SLOTTED  (EASY INSTALLATION WITH MOST GRINDERS) COMPATIBLE TO SIOUX VALVE SEAT GRINDER MACHINE HIGH PERFORMANCE  STONES HARD TO WEAR EXCELLENT GRINDING RESULTS SAVES TIME . STONE SIZES :- 1-1/2" 1 Piece 1-5/8" 1 Piece 1-3/4" 1 Piece 1-7/8" 1 Piece 2'' 1 Piece  STONES CAN BE DRESSED TO ANY REQUIRED ANGLE    BULK QUERY CONTACT US ! FEEL FREE TO ASK ANY QUESTION