Holmatro’ s range of mechanical tools is produced to withstand tough operating conditions over long periods of time. The sustainable cast iron construction makes the tools suitable for use during welding work and for use under water. Despite these rough conditions, the tools are extremely maintenance-friendly. The parts are practically wear-resistent and the cast iron construction is dust proof. The self-locking property of the fully closed ratchet mechanism prevents entrance of the plunger under the pressure of heavy loads, thus making it even safer during use.