Assertion: hammer's surface | /r/HasProperty | rounded
Facets:
value: usually
type: DEGREE
value: slightly
type: DEGREE
Source sentences:
text: The impacting surface of the tool is usually flat or slightly rounded; the opposite end of the impacting mass may have a ball shape, as in the ball-peen hammer.
text: Carver's mallets feature heads where the axis of rotation is in line with the handle (so the hitting surface is always round) in a shape like a cylinder on its end, or a conical frustum, or half of a capsule (see images of "stonemason's mallets" to the right).
text: The impacting surface of the tool is usually flat or slightly rounded; the opposite end of the impacting mass may have a ball shape, as in the ball-peen hammer.