All metal cutters become blunt very quickly in the event of an easy theft. Vicks bits wear out after about 12 uses. The springs are compressed and will not return. I tried 2 of these complete sets with numerous errors at Vicks Beats. Some bits came with the bit rolled sideways and are brittle to be straightened. Not very good quality. Countertops fade very quickly on anything but wood. Includes 3/32 steel, like a filing cabinet.