A magnetic fingerprint dusting brush comprising a handle (10) incorporating a projecting magnet (14) at one end, and a powder cartridge which is a push fit onto the handle, said cartridge comprising a shroud (16), which includes an inner blind sleeve (18) which extends coaxially from an inner cylindrical sleeve (20) of larger diameter, whereby the section (18) receives the magnet (14) and section (20) receives the lower end of the handle (10) when the cartridge is fitted in place on the handle, and a cap (24) which assembles with the shroud (16) to form a reservoir around the shrouded magnet containing a measured quantity of ferrous powder particles (26) carrying dusting powder which align on the shrouded magnet to form a bristle like array (28) exposed when the cap (24) is removed.
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