SI-1310S Features: Maximum Torque : 40Nm Composite body absorbs the vibration remarkably well and also protects your hand from the cold. Compact, lightweight, and a "feather touch" trigger for easy operation. Rear exhaust from handle-end directs air away from operator and workplace. SI-1305 Features: Maximum Torque:90Nm 3/8"sq.palm grip Impact with butterfly throttle lever for quick and easy single hand operation 360°Air inlet swivel for easy manoeuvring. SI-1315S Features: Maximum Torque : 60Nm Composite body absorbs the vibration remarkably well and also protects your hand from the cold.. Compact, lightweight, and a "feather touch" trigger for easy operation. Rear exhaust from handle-end directs air away from operator and workplace. SI-1355 Features: Maximum Torque:90Nm Standard impact wrench with front exhaust Push button action for reverse. SI-1356 Features: Maximum Torque:180Nm A one piece polymer body combined with a pin clutch. Compact and light weight with high torque SI-1365 Features: Maximum Torque:100Nm The ultimate design for a 3/8" sq drive impact wrench. Precision machined air motor for durability Muffled exhaust for industrial use SI-1605 Features: Maximum Torque : 350Nm Rubber grip absorbs the vibration remarkably well and also protects your hand from the cold. Ergonomic design, compact, and lightweight for easy operation. Muffler reduces noise level. SI-1605SR Features: Maximum Torque : 350Nm Rubber grip absorbs the vibration remarkably well and also protects your hand from the cold. Ergonomic design, compact, and lightweight for easy operation. Full power in reverse helps to unfasten bolts quickly for changing wheels. SI-1456 Features: Maximum Torque:220Nm Features a one piece polymer body and newly designed pin clutch for light weight and high torque Compact design for narrow space SI-1650AH Features: Maximum Torque:220Nm 90゜head model Possible to turn the head 360゜ Ideal for changing the blade of tractors and farming equipment