A&M Instruments Stoneworking Diamond Plated Countersink 1" Diameter x 90 Degree Inclusive for Marble and Granite - CS9 1.00Sold individually for $100. 00 each. A&M Instruments Product Code: CS9 1. 00 Material: Marble and Granite Grit: 35 40 Coarse; 120 140 Fine Size: 1. 0" x 90 Degree Inclusive Shank Diameter: 1 2" Used for edging 3 8" to 1 2" thick marble or granite (see product description). Diamond metal bond impregnated type for granite, nickel plated type for marble. For almost 40 years customers around the world have depended on A & M Instruments for high precision

Fine 806 314 165 514 013

Coarse 6801-017

HP858-012M - Shape: Needle

Medium 806 314 150 524 012

A&M Instruments Product Code: FGCAR3557

Sold individually for $16

A&M Instruments Product Code: Fine 4378-0085F

A&M Instruments Product Code: 4018-0031

Coarse 6850-013

Medium 806 314 273 524 018

Coarse 806 314 257 534 023

Fine 806 314 164 514 011