... LOW VELOCITY DRIVE PIN TOOL:1):SDT-A301 tool(similar with DX350), fit DN,.300head pins and .27strip loads,2 ... ):450 tool(similar with DX450),fit NK pins and .27 strip loads.3 ... pins and .25 Disc loads,4):307tool fit DN,.300 head pins and .22 single loads,HIGH VELOCITY DRIVE ... red,black colour2):.25(6.3x10,6.3x12)single or with disc, green,yellow,red colour3):.22(5.6x15, ...