Herbert Type C.C Screws Instrument Set 2068 Herbert Type C.C Screws Instrument Set 1. Guide Wire 1mm 2. Cannulated Drill Bit 2.7mm (S.S) 3. Cannulated Drill Bit 3.2mm (S.S) 4. Cannulated Tap 3.5mm 5. Cannulated Tap 4.5mm 6. Cannulated Screw Driver for Herbert Screws