60 Pack Grinding Stone Set 18" Shank, SHITIME Sanding Drill Bit 12108654mm Cylinder Shape for Rotary Tool Flap Wheel for Grinding, Polishing, Deburring Ferrous Metal

The SHITIME Sanding Drill Bit set comes with 60 pieces of cylinder-shaped grinding stones that are suitable for grinding, polishing, and deburring ferrous metals. Reviews are mixed, with some customers finding the stones to be useful for their intended purposes, such as polishing and grinding soft metals, while others found them to be ineffective or poorly made. One customer thought that the stones were not made of corundum, as advertised, and were not capable of grinding or scratching cast iron. However, another customer found that they lasted longer than previous similar grinding bits used for grinding down steel welds. One reviewer mentioned that some of the stones were glued on crookedly, making some of the smaller stones unusable. Another reviewer encountered a problem where the stones separated from the shaft when used with a standard rotary tool, causing them to fly off at high speeds. However, a customer who bought the set for their wife, who is a pet groomer, found that they worked perfectly for trimming the nails of dogs and cats, and lasted longer than sandpaper disks. Overall, the SHITIME Sanding Drill Bit set may be useful for certain applications, such as polishing and grinding soft metals, but may not be suitable for heavier-duty grinding tasks.