Patent ID: 7992311

Claim:
An alignment and depth indication system with respect to a tool having a rotating means for rotating a drill bit, said rotating means having a longitudinal axis, comprising: first and second light sources; and a means for operably coupling said first and second light sources to said rotating means, whereby wherein said first and second light sources respectively produce first and second light beams, wherein said first light beam is projected at an adjustable acute angle with respect to said longitudinal axis, and said second light beam is projected parallel to said longitudinal axis, whereupon rotation of said rotating means and when said rotating means is held perpendicular to a work surface of a work piece said first and second beams of light project inner and outer concentric circles of light on the work surface thereby confirming that the tool is being held at a perpendicular angle with respect to the work surface, wherein said acute angle can be selected such that said first light beam defines the outer concentric circle of light, and wherein the distance between the outer and inner circles of light corresponds to a desired drill depth, whereupon drilling into the work surface the desired drill depth is achieved when the outer concentric circle of light merges with the inner circle of light to produce a single circle of light on the work surface.