Marson M-4 Air Hydraulic Rivet GunThis heavy-duty air/hydraulic riveter with its newly designed steel forged head can hold up under demanding continuous use. The steel forged head allows for continuous full operating power and less internal wear. M-4 can set rivets from 3/32"through 1/4" diameters in all alloys, and it has the capability of setting structural rivets. In addition to the standard size blind rivets it can also set 3/16" and 1/4" Klik-Split, Kilk-Lock and othe structural blind rivets. The M-4 is supplied with 3/32", 5/32", 3/16" and 1/4" standard nosepieces, service tools, swivel inlet air coupler and a mandrel collection bottle. The recommended airline pressure is 85-95 PSI. The M-4 will also set plastic rivets, no modifications necessary. Weight: 6.2 lbs.