• This listing is for ONE NEW 16mm REPLACMENT METAL HANDLE for the Italian made single sided M2 & M3 splicers designed by Leo Catozzo and sold by Ciro,  and Guillotine Corporation. The splicers shown are only examples of models the handle will fit. 
• This OEM part is one of the more common replacement parts used when the original plastic handle breaks. Installation requires removal of the hinge pin. That is done by removing the milled nut on one end and compressing the bridge slightly while pulling the pin out.
•  The new handle comes with a flat spacer which replaces the rounded one which sits atop of the blade and bridge. I suggest you consider lubricating the posts while it's apart. Do not be temped to remove the screws securing the U-blade as they are carefully aligned. The Boston Connection Inc has 40 + years of experience doing repairs and tune-ups that assure results, consult them if you have better things to do. (like making or watching films). 

Note the images show what the original looks like and the replacement handle along with the two forms of packing offered by the factory over the years.