A log grapple mod. PTO - 550/SP has been subject to a test on a performing Material Handler of 22 tons. The customer, a major operator of the East-European timber trade, needed a strong grapple with 2100 mm opening, for unloading wagons of timber. The test conducted in the presence of all those involved and local authorities has been successful: the clamp has proven sturdiness and reliability. The model involved, PTO - 550/SP, is a reinforced version of PTO - 550/S: this in fact is indicated for loaders up to 18 tons.