16 yr. old Ben: He has a similar appearance from Ultimate Alien except he has a larger body and has holes protruding from his head. He has a reconstructed stomach and the glass is in the shape of a hexagon. On the back he has a black stripe that splits into two smaller ones with a keyhole between the two lines
11 yr. old Ben: He has a thinner and rounder head, wears a white and black shirt. He has a smiley face and unlike 16 yr. old Ben's Clockwork his glass is circular.
Clockwork is not very durable, due to his copper like body, therfore he is an easy target for energy and close range attack, as shown when Overlord's glove's beam striked him in the arm shutting off his gears along with the Ultimatrix, when he reverted Ben's arm was broken, and when one of Vilgax's Squid Monster hit him on the gear on his head which as a result left him tempporarally paralyzed.
Because of his large body, he is quite low on stamina or he tires out quickly.