Ohhh, if only we had this set 2 weeks ago as we attempted to repair a freeze crack in a jet pump (as it was we had to order the whole pump casting). With these hard yet refined tips for your rotary tool there's nothing you can't make smaller, more precise, more fitting, more detailed. 25 individual tools shaped and incrementally sized to fit the requirements of your project - 10 cylinders, 3 ball-ends, and 4 cones of various diameters, as well as a czar's hat, a shaft-mounted micro disk, and 5 larger disks designed for screw shaft mounting. An essential accessory set for rotary tools and mini die-grinders accommodating the popular 1/8" shank size for forming, carving, finishing and polishing glass, tile, stone as hard as granite, and metals as hard as steel (cast-iron in our case).