Bell
As the archetypal feminine principle the Dill boo [bell] represents the perfection of wisdom which directly perceives the primordial nature of shunyata [emptiness]. Its sound describes emptiness as it the sound arises from silence and dissolves back into silence. As such it represents the mandala of creation and dissolution; the bottom rim of the bell reps the disc of emptiness from which all arises, these being symbolised by the ring of lower dorjes, the garlands of hanging pearls, the upper horizontal dorjes, all forming the base for eight seed syllables of the eight goddesses. The main feature fo the handle is the face of Vajra-para-mita, the greatest Goddess representing the union and perfection of all wisdom and awareness. From her elaborate crown rise the five wisdom jewels which form the vajra cap to the bell.

Dorje
DORJE
As the archetypal male principle the dorje it is the quintessential symbol of the 'diamond mind of enlightenment' so hard that it is able to cut through all illusions and deceits and arrive at the clearlight of truth in its two forms. These two forms of truth are symbolised by the two pronged dorje and are relative truth - needed for daily living ie. science, practical knowledge etc., and absolute truth which reveals the inner nature of the universe. The central hub from which the prongs arrive represents the sphere of actual reality. From this sphere arise two eight petalled lotuses crowned by two full moon 'discs' from which emerge the five upper and lower prongs. These five represent the Five Buddha families, the five elements, and the five skandhas [form- feeling - perception - motivation and consciousness- which the outer four are curved into and merge with at the tip.] As such the dorje is the great alchemical symbol and represents the creation of the 'philosophers stone'. In Tibetan dorje means the indestructible stone. The dorje is considered the ultimate spiritual weapon in that it is used to banish the forces of darkness, ignorance and disharmony with its power of lightning and clear truth. It is held in the right hand and twirled according to the pattern of the particular ritual, where it also represents 'skilful method'.

Hand Mudras: How to use the Vajra and Bell

Himalayan Bell and Dorje Demo

It's also an emblem of the green buddha of the north, Amoghasiddhi, and represents his all-accomplishing wisdom as lord of the karma family of activity.

The raised throne upon which masters are seated when teaching is traditionally decorated on the front by a hanging square of brocade displaying the image of a crossed vajra in the centre, often with four small swastikas in the corners. This emblem represents the unshakeable ground or reality of the Buddha's enlightenment.