The SQC Twist Drill gRack (gS 98.8187) stores 7 gSource SQC twist drills, 1 each (sold separately) 1.1mm to 3.5mm [.045” to .138”]. The drill rack folds to close for convenient sterilization and storage. When opened, it converts to a tabletop stand for use in the operating room. Drill bit diameter and reorder numbers are marked inside rack for easy identification.