SI-1052 More powerful than SI-1051 Have regulator built-in Compact body design for reduce weight and easy operation SI-1060 6mm capacity straight grip impact driver Compact, lightweight, ergonomic design for easy operation General use SI-1062 More powerful than SI-1061 Built-in regulater Compact body design for reduce weight and easy operation SI-1065 6mm capacity pistol grip impact driver General use Ergonomic pistol grip for easy operation SI-1070 6mm capacity pistol grip imapact driver General use Compact, lightweight and a "feather touch" trigger for easy operation. SI-1356D 8mm capacity pistol grip impact driver Double hammer mechanism SI-1365D 8mm capacity pistol grip impact driver Industrial use SI-1140 4mm capacity straight grip screw driver Clutch mechanism for easy adjustment of maximum torque SI-1161 6mm capacity straight grip screw driver Adjustable clutch Compact, lightweight, and ergonomic design for easy operation SI-1166A 6mm capacity pistol grip screw driver Adjustable clutch Ergonomic pistol grip for easy operation