This 20‑piece long hex allen screwdriver bit set provides 4‑inch extended reach to solve troubles of deep hidden screws that standard short bits cannot touch. Each bit is forged from high‑grade S2 alloy steel with special torsion zone design, effectively absorb impact force and resist fracture under high‑torque impact driver working.Magnetic tip holds hex screws securely so you can finish installation and removal with one hand without worrying about fastener falling off. CNC precision machined hex tip maintains tight matching with screw inner hex cavity to avoid slipping and screw head damage.This comprehensive set includes both metric and SAE inch specifications, covering 1.5mm to 8mm metric and 5/64 inch to 5/16 inch SAE sizes. Standard 1/4 inch hex shank is compatible with most cordless drills, impact drivers and manual screwdriver handles.Ideal for multiple scenarios including automotive maintenance, mechanical equipment repairing, furniture assembly and woodworking projects. The matched transparent storage box features clear size labels, you can quickly find the needed bit. All bits can be stored tidily inside the case, easy to carry for on‑site work and garage storage.
