I bought this to use a Cel AP05 accessory set on my draper because one reviewer said it allowed the use of cel blades on a draper tool, but I actually found that is wasnt necessary, the blades fit on the hexagon connection without it. There is the smallest amount of play in the blade before tightening, but less than there is when using it with the adaptor which I found strange. So save yourself some money and buy the accesories first and then see if it is needed.
Some extra info..
Cel customer service said it worked on most multitools apart from wolf. I know it is required for the worx sonicrafter as my friend has one and its required for Bosch, Makita, Fein and many others if you intend on using the AP05 set or any of their first blade types.
Cell now have a new fitting system on their newer blades called Cell OIS that allow for direct use on bosch and makita type fittings, but the adaptor is still required for Fein. The new upgraded pack is called AP10
Hope that helps
Having used more of the various attachment in the ap05 pack I have noticed that some are a better fit than others which is very strange, the finger pad sander seemed too large for the draper hex allthough it did work witout the adapter, whilst the ceramic attachment was an ideal snug fit. Thought it a bit odd and worth a mention.