Two models are a tool change blade (possibly scxcrewdriver, possibly allen key) the top of the range model is tool free.
Check the manual
or
Ask in B&Q
or
http://www.bymacallister.com/service/aftersales-help-advice
Unfortunately, like any other budget, store labelled "brand", support is next to no-existent; I could find no manuals to download. It's have been a different story with a Bosch product.
acp, March 2017
