Chamfer

Chamfers are frequently used in machining, carpentry, furniture, concrete formwork, mirrors, and to facilitate assembly of many mechanical engineering designs.

In furniture-making, a lark's tongue is a chamfer which ends short of a piece in a gradual outward curve, leaving the remainder of the edge as a right angle.

[1] Chamfers are used in furniture such as counters and table tops to ease their edges to keep people from bruising themselves in the otherwise sharp corner.

This pioneering design opens up broader perspectives, provides pleasant pedestrian areas and allows for greater visibility while turning.

In machining a chamfer is a slope cut at any right-angled edge of a workpiece, e.g. holes; the ends of rods, bolts, and pins; the corners of the long-edges of plates; any other place where two surfaces meet at a sharp angle.

Chamfering also removes sharp edges which reduces significantly the possibility of cuts, and injuries, to people handling the metal piece.