You can use your existing spanner to tighten and remove.

There are two different thread sizes on most rotary hobby tools. There is an imperial size, which fits Dremel and similar, and there is a metric size, which fits Proxxon and similar.

This Nibbler Extender is the IMPERIAL version, for use with Dremel and similar tools.

7mm neck diameter

48mm overall length

CNC machined from stainless steel

Maximum 20000 rpm

Complete with solid support collet