Herein note focussed the attention on the vibration levels issued by two portable shakers models build in different and subsequent times by the same building company, which present different design and constructive solutions for both the handles. The two tools were used, during tests, by a single operator, expert in the use of this typology of tools due to his job activity during the olives harvesting campaigns; the measurements were carried out respecting the indications contained in the provisions UNI EN ISO 5349-1 (2004) and UNI EN ISO 5349-2 (2004). A different dynamic behaviour of the two tools emerged from the tests. The results point out, in a particular way, the high values of acceleration transmitted to the hand-arm system produced by the examined portable shakers: the vibration values are greatly higher than the limit ones laid down in the Italian law in force.