Thousands of satisfied customers testify to the durability and simplicity of the Tumble-Vibe 10. Mated with a spare bowl and a GSH-2 Stone Finishing Kit, this is a must for any professional. The kit comes complete and ready to operate with a motorized base, one bowl, clear lid, two rubber nuts, and all the grits necessary for accomplishing the grinding step through the final polish step of most gemstones. The four steps that are included are Silicone Carbide (100/120) – rough grind, Silicone Carbide (700F) – fine grind, Iolox 50 – pre-polish, and Raybrite TL - polish.