A multi-purpose layout tool and drill guide, and related components and accessories, including a mounting L bracket, laser, swivels stand, headband and lamp.

A head unit for a stop holder for a drilling machine for purposes of compensating for a height displacement between two adjacent components during the introduction and/or machining of a component hole. The stop holder has a front rest section for purposes of resting on the components. The rest section has an axial projection, which forms a second contact surface displaced relative to a first contact surface in the axial direction, i.e., the tool longitudinal direction. Also disclosed is a stop holder, and a method for compensating for a height displacement between two adjacent components during the introduction and/or machining of a component hole.

An adjustable drill jig system for drilling holes in a workpiece includes a first T-shaped element having a stem and a crossbar; a first guide engaged with the stem, the first guide having a stop plate extending perpendicular to the stem; a double bracket having a first channel and a second channel, the first channel to engage with the crossbar; an extension ruler engaged with the second channel of the double bracket and extending away from the cross bar; and a second guide having a drill bushing; the second guide is to engage with the crossbar or the extension ruler for placement of the drill bushing; and the adjustable drill jib system allows for drilling one or more holes in the workpiece.