MidAtlantian
Bell Extendo Handlebar Ends, bolt's hex key strips before ends are snug.
Bell Helmets produces Extendo Handlebar ends, marketed as "Bell" . They are very lightweight, but welded, not glued, so one might hope for a quality product. When I installed them on my bike's handlebars, I had initially not tightened them enough to keep them from moving, so I tried to tighten them some more, but the bolts intended to do that were so soft that the snug fitting allan keys rounded the inside of the bolt. The bolts were .... not as soft as butter, but you get the idea: total junk! Very disappointing. I will not purchase any Bell bicycle products again.