#37 Carbide Medium Inverted Cone
The #37 is not the smallest (33 1/2 is) or the largest (the 39 is) Inverted Cone.
It is 1.4mm in diameter and 1.4mm in length and works great for metal and wood for undercutting.
For use in high speed tools such as the NSK Presto and others requiring friction grip, 1/16″ shank burs.
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