Set of six precision hex drivers which would fit the small hex screws used on our SEM specimen holders. They are also useful for repairs and adjustments on microscopes and other instrumentation. Covers both small standard (inches) and metric allen screws. Set contains sizes: 0.028"/ 0.7mm, 0.035"/ 0.9mm, 0.050"/ 1.3mm, 1.5mm, 1/16" and 5/64"/2mm. Precision Hex Drivers, Set of 6