Multi-purpose layout tool and drill guide, and related components

A drill guide and layout tool comprising:

• a block member;
• two spaced-apart V-jigs projecting from the block member, wherein each V-jig has a V-shaped opening defined by two angled apart V-sides and having two V-tips, one V-tip at the distal end of each V-side, and the V-shaped openings are aligned such that together the V-shaped openings define a V-jig axis passing through the bottom of each V-shaped opening;
• and
• a center drill guide hole through the block member at a location centered between the V-jigs and aligned with the V-jig axis;
• wherein, the tool may be used to guide a drill by:
• in the case of longitudinally extending material of an appropriate size and configuration, placing the tool against the material with the V-jig axis aligned with the longitudinal axis of the material;
• or in the case of longitudinally extending material having a profile that does not permit aligned insertion within the V-shaped openings or a non-longitudinally extending material having a complex curved surface, bringing the four V-tips into contact with the material.