Instruments for drawing circles
Irregular surface ellipsograph
Layout instrument for sheet-material fabrication
Level assembly
Line holders for brick and concrete block laying
Magnetic drawing toy
Manipulator for creating a multiplicity of varied line designs
Marker apparatus
Marker compass
Marker holding device for an ice scribe
Marker holding device for an ice scribe
Marking and cutting device
Marking gauge for measuring and marking French mats
Marking system
Mason's guide
Measurement line marker
Measurement tool
Measuring and drawing instrument
Measuring apparatus
Mechanical corner system for brickmasons