#21B Acorn (large) double end stainless steel burnisher with regular handle. The HSB Burnisher, Acorn Double-End #21B, is expertly designed for dental professionals seeking precision and reliability in operative procedures. Manufactured from durable materials, this double-ended burnisher features acorn-shaped tips that are specifically crafted for forming occlusal anatomy in posterior restorations.With a handle made of AISI 410 and tips in AISI 440, the instrument is engineered to provide the optimal balance between strength and operability. Each working point measures 2.7mm and 3.0mm, making it an essential tool for enhancing dental restorations with accuracy.