A&M Instruments Stoneworking Demi Bullnose 1/2" Radius Plated Diamond Router Bit for Marble - DBN 0.50Sold individually for $90. 00 each. A&M Instruments Product Code: DBN 0. 50 Material: Marble Grit: 35 40 Coarse; 120 140 Fine Head Diameter: For 1 2" Radius 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 Diamond Cutting

Medium 836KR-014

A&M Instruments Product Code: M45

Old ISO #: Fine 8848-015

New ISO #: Fine 806 314 141 514 013

Coarse 806 314 166 534 017

4378-0030   in Coarse grit is 120 mesh

Coarse 6856-026

Old ISO #: Extra Fine 1889-007

Head Length: 5

Manufactured for medium speed rotary carving tools (up to 20

New ISO #: Medium 806 316 001 524 009

Old ISO #: Fine 8847KR-015