Sioux Valve Seat Grinding Stone Set 12 Pieces with Holder, 11/16" Star Drive

This valve seat grinding set includes 12 vitrified bond stones made from durable pink aluminum oxide, offering medium 80 grit for precise and clean cutting. Ranging in size from 1 inch to 2-1/2 inches, the stones fit an 11/16" thread and are compatible with Sioux valve seat grinders. Also included is one Sioux-style holder with 11/16" star drive and ball. Whether you're servicing automotive heads or small engines, this set provides all the essential sizes for accurate valve seat resurfacing. Ideal for machine shops, engine rebuilders, and technicians who require reliable and consistent results.

• Includes 12 stone sizes 2-1/2", 2-3/8", 2-1/4", 2", 1-7/8", 1-3/4", 1-5/8", 1-1/2", 1-3/8", 1-1/4", 1-1/8", and 1" - ideal for a range of valve seat diameters
• 12-piece valve seat grinding stone set with 80 grit medium vitrified bond
• Made of pink aluminum oxide for smooth and effective seat resurfacing
• Includes 1 Sioux stone holder with 11/16" thread and star drive with ball
• Designed for Sioux valve seat grinders – perfect for automotive and small engine rebuilders