Definition of mantels:
(n) :
A surname.
(n) :
The shelf above a fireplace which may be also a structural support for the masonry of the chimney.
(v) :
(climbing) To surmount a ledge by pushing down on the ledge to bring up the body.
(n) :
(climbing) A maneuver to surmount a ledge, involving pushing down on the ledge to bring up the body.