AO-Type Bit 7 mm I-Handle 21.5 cm — Internal-Fixation Bone-Screw
The AO-Type 7 mm I-handle bit at 21.5 cm length follows the AO/ASIF Arbeitsgemeinschaft-für-Osteosynthesefragen Swiss-Foundation 1958 (Müller-Allgöwer-Schneider-Willenegger) internal-fixation principles. The 7 mm AO-bit is the AO-cancellous-screw-driver tier — 7-mm AO-cancellous-screw insertion through I-handle during DHS dynamic-hip-screw fixation of intertrochanteric-fracture AO/OTA-31-A1, AO-cancellous-bone-screw extraction during hardware-removal after fracture-union 12-18-months-post-fixation, and broken-screw retrieval with AO-bit-stuck-extraction set protocol use for stripped-or-broken AO-cancellous-screw. AO-bit 7mm.
AO-bit use
- 7mm cancellous-screw DHS AO/OTA-31A1
- Hardware-removal 12-18mo post-union
- AO-stuck-extraction set stripped-broken
AO-Type 7 mm I-handle bit 215 mm, AISI 420 stainless. Hand-finished in Sialkot.





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