詳細介紹:
SPECIAL HEAD & RECESS - NON-IND. HEX WASHER HEAD WITH SQUARE/PHILLPS/SLOT RECESS, NON-IND. HEX HEAD WITH PHILLIP/SLOT RECESS,BINDING HEAD WITH UNDERCUT & SQUARE/PHILLIPS/SLOT, TRIM HEX HEAD WITH POZI RECESS, SQUARE HEAD, SQUARE HEAD WITH PHILLIPS RECESS.