Sioux Valve Seat Pink Grinding Wheels Set 20 Pcs Stone Holder. Grinding Wheels Set 20 Pcs. VITRIFIED BOND 80 GRIT MEDIUM. ALUMINIUM OXIDE PINK STONES. 2 1/2 – 2Pcs. 2.1/4 – 2 PCS. 2 – 2 PCS. 1.7/8 – 2 PCS. 1.3/4 – 2 PCS. 1.5/8 – 2 PCS. 1.1/2 – 2 PCS. 1.3/8 – 2 PCS. 1.1/4 – 2 PCS. 1 – 2 PCS. STONE THREAD – 11/16. 1pc SIOUX HOLDER 11/16. THREAD STAR DRIVE with Ball. FEEL FREE TO ASK ANY QUESTION THANKS FOR LOOKING! PROUDLY MADE IN INDIA.