No photo is showing up. Is it an Elby tool? If so, while they make great front sight tools and I have a couple (for a Mosin and a Lee Enfield) none fit the G1911. My Mosin tool almost does but won’t quite fit over the front sight band. I did pick up a nut splitter as Pierre advises buy have been having a lot of trouble angling it correctly to work... But it’ll help in a couple months when I get my K31 back and have to do the same.
And just to whisper in his ear, it would be great if SwissProducts came out with front sight tools for the different Swiss rifles. *hint hint*