A buckle for securing strap ends to each other has an anchor peg, with a recess, attached to one strap end. Another strap end has a clamping head that has a recess adapted to allow insertion and removal of the anchor peg. A moveable locking mechanism in the clamping head can be moved from an open position, that allows insertion or removal of the anchor peg, to a closed position that prevents removal of an anchor peg inserted into the clamping head.