C.R. LAURENCE H4097 CRL White 3/8" Spline T-Crank Handles for Andersen Windows. Replacing casement operator handles with diecast CRL T-Crank Handles allows for the uninterrupted sight lines of today"s modern window treatments. These handles have a 3/8" (9.5 mm) spline and is used by Andersen Windows.. Part Numbers Variations: H4097