electric tools insulated screwdrivers insulate strippers multytester blueprints on vintage white wood

adhesive background black blueprint check closeup construction dielectric digital display diy electrical electrician electricity electronic equipment hand home improvement indication industrial industry instrument insulate insulating insulation maintenance manual measure measurement multimeter multitester nippers nobody professional red repair repairing resistance rolled screwdriver sellotape shot spool strippers studio tape technician tester tool tools voltmeter white wire work yellow