A&M Instruments Industrial Diamond 1/4" Twist Drill - 14twistdrillSold individually for $18. 00 each. A&M Instruments Product Code: 14twistdrill Grit: 120 Coarse Head Diameter: 0. 25" or 1 4" Overall Bur Length: 4. 0" Shank Diameter: 0. 25" or 1 4" Diamond coating extends 0. 50" or 1 2" from the tip. 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 cutting or grinding.

Old ISO #: Ultra Fine 3862-011

A&M Instruments Product Code: H28 (Special Order Item)

A&M Instruments Product Code: F2

A&M Instruments Product Code: A3L

Extra Fine DISC100220EF

Disc Diameter: 0

New ISO #: Medium 806 314 299 524 014

Coarse 806 314 173 534 025

Head Diameter (D): 0

Coarse 806 104 172 534 041

A&M Instruments Product Code: K3

A&M Instruments Product Code: R9