Another "What is it"!

[500e]

Paul yours is the heavy duty model

They've been mentioned a few times on here, here is mine, brilliant piece of kit, used it just before Christmas on bridge repair in Scotland...... or may be not.
View attachment 78701

 

[pedrobedro]

We used to call it the Dan Dare ray gun when our next door neighbour had one. He did some semi successful bits on his old Ford Anglia.