Dave Sr. from SWISCO responded:
July 7, 2016
Hi, Frank. This looks like the older style Roto operator, which used a hex spline handle. The problem with these operators is that after the black plastic collar wears out, the handle does not stay in the operator housing. That's one of the reasons why Roto changed how their handles attach. Take a look at the newer style 39-329 and 39-330 operators, which take the 39-114L or the fold down 39-205 handles.
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