These mandrels are compatible with any rotary tool. There are 12 units in each package, and 3 pieces to each unit. They include: shank, screw & washer. Great for use with rotary tool accessories, such as saw blades or cut off wheels. Simply remove the screw and washer, then line up the hole in the saw blade, but the screw through the washer and then the blade, and fasten it down by turning the screw. The flat part of the shank is 40mm and the entire unit with the bulbulous head is 45mm.

12 Units In Package- Each unit is 3 pieces: shaft, top screw and washer

Great set for really big jobs-you can prepare several sets ahead of time to save time

Each of these mandrels is 1-3/4 inches long-use with drill or rotary tool

These mandrels all have a 1/8" shank-you can mount other accessories such as saw blades

Many rotary tool accessories require a mandrel for their use-you'll be prepared with this set