Features and Benefits:Fits the 2660 M18 FUEL? 1/4" Blind Rivet Tool w/ ONE-KEY?;Adds minimal size or weight to the tool;Flexible material allows for easy install and removal;Best in class performance;Not made for use on or near live electrical circuits;Includes: (1) M18 FUEL? 1/4" Blind Rivet Tool w/ ONE-KEY? Protective Boot (boot only);The M18 FUEL? 1/4" Blind Rivet Tool w/ ONE-KEY? 6" Extension is the perfect solution to use when installing rivets in hard to reach applications. The all-metal extension is designed to be low profile at only 1.34" in diameter, equal to the clearance of the standard outer jaw housing on the 2660. Compatible with 3/16", 7/32", 1/4" and 9/32" nose pieces for the M18 FUEL? 1/4" Blind Rivet Tool w/ ONE-KEY? only (sold separately).