A&M Instruments Industrial Diamond 0.312" Mandrel - 4384-0312Sold individually for $20. 25 each. A&M Instruments Product Code: Fine 4384 0312F; Coarse 4384 0312C Grit: 220 Fine; 120 Coarse Head Diameter: 0. 312" Head Length: 0. 312" Clearance: N A Overall Bur Length: 2. 25" Shank Diameter: 1 4" For almost 40 years customers around the world have depended on A & M Instruments for high precision Diamond Cutting Tools, CNC Machining, and Swiss Screw Machining. A & M Instruments manufactures diamond rotary tools

Old ISO #: Fine 8858-022

A&M Instruments Product Code: HP805-012C

Item sold individually at $11

New ISO #: Medium 806 104 010 524 018

A&M Instruments Product Code: A3

A&M Instruments Product Code: Q9

Coarse 806 314 197 534 016

HPC560 - $3

Medium 858-016

Coarse 6850-013

A&M Instruments Product Code: 4018-0031

A&M Instruments Product Code: 4814-0250