Magnetic cropper
Magnifying device for use with a triangular rule
Map reading and plotting instrument
Map reading and plotting instrument
Marine azimuth and intercept plotter instrument
Marking and measuring instrument
Marking and measuring tool
Marking guide for use with framing studs
Marking guide for use with metal studs
Marking tape measure
Marking tool with wear rims
Mason's guide
Mason's scale and masonry guide employing said scale
Masonry alignment device and method of using same
Masonry clip
Masonry guide
Masonry guide
Masonry guide
Masonry guiding tool
Masonry guiding tool