5/16” Tri-Wing #4 Hex Insert Bits Description: MRO Tri-Wing ® Bits are designed with a screw drive that has three radial slots. MRO Tri-Wing ® Bits are designed to respond to the constant demands of driving applications and can be used for driving screws and fasteners with hand tools, corded or cordless power tools, and pneumatic tools. MRO Tri-Wing ® Bits are extremely popular throughout the aviation and automotive industries, or anywhere quality tooling products are required.

Technical Specifications: Recess Size: 4 Screw Size Tension Head: 8-32 Screw Size Shear Head: 10-32 Overall Length: 1 5/16”/ 32mm Equivalent Part Numbers: TWE-4, TW-4AD