Tool assembly

A tool assembly comprising:

• a pair of rails that cooperate to form a set of ways;
• a hidden object detector slidably mounted on the ways;
• a display member mounted to a first one of the rails;
• and
• a marking unit coupled to the hidden object detector and disposed in-line with the display member, the marking unit being activated in response to detection of a hidden object by the hidden object detector to generate electromagnetic radiation that impinges on the display member to thereby form a mark on the display member.

A tool assembly comprising:

• a frame having a pair of rails that define a set of ways, a first one of the rails having an internal wall that is partly exposed;
• a level sensor mounted to the frame;
• a pair of suction cups coupled to the frame;
• a hidden object detector slidably mounted on the ways;
• a display member mounted to the exposed portion of the internal wall;
• a hidden object marker slidably disposed on the frame;
• and
• a marking unit coupled to the hidden object detector and disposed in-line with the display member, the marking unit being activate-able to form a mark on the display member.