Aaron's Rod is a type of decorative rounded molding that is interwoven with a motif of tendrils, leaves, a snake and vines.
An adjustable curve ruler is a type of ruler that may be bent and set in any curve position. There are different types of adjustable curve rulers available. It is used in general drafting and may be used as a replacement for the French curve or along with it depending on the person's needs.
A draftperson's triangle featuring an adjustable arm capable of being clamped at different angles. It was created to eliminate a draftperson's need of various triangular shapes. A protractor placed between the adjustable arm and the place where it is hinged assesses the angle of the clamped triangle.