Barnhart Curette 5-6 XP has a Posterior/ Narrow blade designed for subgingival scaling and root planing. Barnhart number 5-6XP curette is a staple in dental hygiene care. It has a deeper shank angle for posteriors and can treat shallow pockets with subgingival calculus and gingivitis. All curette are made in the USA with XP technology that allows this dental instrument to be the only sharpen free dental hygienist tools on the market.