I will kick this review off by saying that this is the most quality built rotating laser I have ever reviewed. Considering how delicate the components are inside, Hilti have protected this unit to the best of their ability. The drop-resistant housing of the Hilti PR 300-HV2S Dual Grade rotating laser has four shock absorbing handles allowing it to survive drops from up to 1.5 metres, which after much deliberating, I did test and glad to say the device is still in one piece.