Structure mountable assembly

A modular tool assembly comprising:

• a. a tool base having a lower housing portion and an upper housing portion including a guide member having one or more receiving portions;
• b. a mounting seal extending from the lower housing portion cooperating with the mounting surface to define a vacuum pocket therebetween;
• c. a power source disposed within the upper housing portion;
• d. a vacuum generating mechanism electrically connected to the power source and disposed within the upper housing portion, the vacuum generating mechanism including a motor, a pump operatively driven by the motor configured to remove air from the vacuum pocket through an aperture in the lower housing portion to secure the housing to the mounting surface and a sensor mounted proximate the aperture in the lower housing portion which monitors the vacuum pocket and activates the pump if the sensor detects a loss of pressure in the vacuum pocket;
• e. a switch operatively connected to the vacuum generating mechanism disposed on the upper housing portion of the tool base allowing a user to activate the vacuum generating mechanism;
• and
• f. a modular tool attachment including a laser generator housing that includes laser diodes contained within the housing that are self-leveling, wherein the laser generator housing is rotatable with respect to the base in at least one direction.