1):660 Powder Actuated Tool absolute professional, 2):good quality and very competitive prices ... fit DN,.300head pins and .25 Disc loads,4):307 Powder Actuated Tool fit DN,.300 head pins and .22 single ... pins,eye pins and 6.3x16 loadspower load specially fit powder actuated tool,we have every size and very colour power loads ... ,low velocity)single,brown,green,yellow,red colour 660 Powder Actuated Tool