Excel Impex Diamond Grinding Plain Head is ideal for shaping all types of glass with consistent and accurate tolerances. They can be used on stained glass grinding machines for grinding, grooving and mitering glass. They are available in different standard sizes and grit sizes. Diamond grinding head is an essential tool for every stained glass artist, lampworking and detailed work on glass and ceramics. A product manufactured by Excel Abrasives. Made in India. Excel Impex diamond grinding heads are made of quality brass material, and the surface is plated with diamond grits. the double-coated bonding surfaces ensure the high level performance, strength, and durability