A&M Instruments Industrial Diamond 0.93" Counter Sink - 4664-0930Sold individually for $58. 00 each. A&M Instruments Product Code: 4664 0930 Grit: 120 Coarse Head Diameter: 0. 93" Head Length: 0. 30" Overall Bur Length: 2" Shank Diameter: 1 4" The angle of A & M Instruments counter sink is 90 degrees. Manufactured for use in power drills and routers. Note: Always wear proper eye protection and gloves when using any cutting or grinding tool. All diamond tools last longer if a lubricant or coolant is used during

Old ISO #: Medium 801LS-009

Old ISO #: Medium 852-035

Coarse 806 314 173 534 013

Extra Fine 806 314 001 504 020

New ISO #: Extra Fine 806 314 277 504 016

Super Coarse 806 314 197 544 016

New ISO #:  Fine 806 314 164 514 022

312" or 5/16"

A&M Instruments Product Code: Fine 4388-0050F

New ISO #: Ultra Fine 806 314 246 494 014

A&M Instruments Product Code: H2

Old ISO #: Medium HP805-016