Federal Stock #'s Chapman Part # Size Federal Stock # CMB-51 0.1110 5120-01-127-0718 CMB-52 0.0960 5120-01-118-9972 CMB-53 0.0720 5120-01-118-9970 CMB-54 0.0600 5120-01-118-9971 Great for older equipment with tamper resistant screws Military or personal helicopters New electronics like cameras, phones & GPS systems Antique radios, ham radios, military communication equipment "I don’t often take the time to give compliments to a vendor but it’s very gratifying to see a quality U.S. made product that works. In my hobby (Ham Radio) of restoring communications equipment... I have to deal with Bristol fasteners and being able to use interchangeable bits instead of Allen wrenches is great." -Craig Please note:The Bristol 6 Flute Spline Insert screwdriver bits are only available as a rack.
