A&M Instruments Industrial Diamond 0.187" (3/16") x 1/4" Shank Grout Removal Bit - 4814-0187SPSold individually for $16. 50 each. A&M Instruments Product Code: 4814 0187SP Grit: 120 Coarse Head Diameter: 0. 187" (3 16") Shank Diameter: 1 4" (Heavy Duty) A&M Instruments' heavy duty grout removal bit is a high speed bit with a diamond impregnated tip on a 1 4 steel shank. For use with rotary tools and hand drills. Ideal for clean, fast removal of wall, floor and corner grout 1 4" wide. Removes both sanded and non sanded grout. For best results,

Old ISO #: Medium 806-010

Old ISO #: Fine 8858-022

Fine 806 314 166 514 017

Medium 852-012

Old ISO #: Medium 845-010

This diamond bur is equivalent to Dremel 7117

Coarse 6879K-013

All diamond tools last longer if a lubricant or coolant is used during cutting or grinding

Fine 806 314 274 514 012

Old ISO #: Medium 825-023

Special Order

Old ISO #: Medium 811-037