Apex BC9-C Torx® BitCase™ – 9 Piece Precision Bit Assortment9 Piece Insert Bit Assortment with Magnetic Bit Holder The Apex BC9 C BitCase Aviation Bit Set is a compact professional assortment designed for technicians working with aerospace and specialty fasteners. This relaunch of the classic Apex BitCase kit provides a carefully selected range of Torq Set, Phillips, and Tri Wing insert bits commonly encountered in aircraft maintenance and precision mechanical applications. Each kit includes nine high quality