Rhin-O-Tuff HD8000 - Manual (Page 6)

Setting the closer bar height:
The closing bar is adjustable on each end allowing the operator to achieve a
uniform close at each end of the book. Pull the handle on the closer all the way down
and keep held down as you adjust both knobs
so the top edge of the closing bar
lines up on the decal marks with the wire size you have chosen.
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