Barnhart Dental Curette 5-6 X for Posterior mouth surface has narrow blade, and deeper shank angle for posterior teeth. Barnhart Curette 5-6 X dental hygiene instrument has a very fine and sharp smooth edge that is designed to more efficiently root plane. This is why one must take care not to abuse the edge on margins, overhangs, or by breaking away difficult calculus. American eagle dental curettes are Made in the USA.