Allows for excellent line of sight for greater accuracy
 

Adjust depth of drive at the tool, not at the compressor
 

Avoids damage to work piece by preventing blank firing

Easily remove jammed nails without disassembly of tool

Better line of sight. Better maneuverability

Easily switch between bump and sequential fire without tool or switching triggers
 

Keeps debris from the valve and o-ring improving life of the tool

Easily adjust direction of adjust
 

More Compact. More Power.