Analyze the relationship between 'Assa Abloy' and 'lock' within the context of the input sentence.
Options: manufacturer, location of formation, distributed by, product/material produced

Strengthening customer demand allowed companies including Swedish lock maker Assa Abloy (ASSAb.ST) , packaging maker Smurfit and dairy group Danone (DANO.PA) to raise prices or lift margins.
product/material produced