masonry tools [1]
The purpose of masonry is to build and repair structures or to cover walls with brick, stone or concrete blocks.
caulking gun 
Instrument using a piston mechanism for applying caulking to seal joints and openings.
piston release 
Elbow-shaped shaft with a push stick (piston) that compresses the contents of the cartridge or releases the gun.
cartridge 
Small replaceable reservoir, fitted with a nozzle and containing a malleable, adhesive caulking.