mature woman with nails holding a group of allen keys, tools used to tighten or loosen screws of the same type

allen background black car carpentry chrome closeup comparison concept construction differs equipment finger fix greater group hand handyman hex hexagon hexagonal holding home improvement inches industry inner iron isolated key keys kit loosen maintenance mature measured mechanic metal metallic millimeters nails object pattern repair resists screw set silver spanner steel support tighten tool tools torque type various which white whitworth woman work wrench