IW 100:
Air exhaust direction: through the handle
Anvil type: with ring, without hole
Hammer mechanism: twin hammer
Hammer mechanism lubrication: grease

IW 150:
Air exhaust direction: through the handle
Anvil type: with ring, with hole
Hammer mechanism: 3-jaw
Hammer mechanism lubrication: grease

IW 150:
Air exhaust direction: through the handle
Anvil type: with ring, with hole
Hammer mechanism: pin-clutch
Hammer mechanism lubrication: oil

Available version with log shaft: IW 100L - IW 150L - IW 201L