For mounting base at 90 degree internal corners.

Manuals & Documentation
Catalog Number 5017B
Manufacturer Legrand-Wiremold
Brand Legrand-Wiremold
Country of Origin United States
Made in USA Yes
RoHS URL http://www.ideadigitalcontent.com/files/11311/ROH_Legrand_ROHS_statement.pdf
UPC 786776050295
GTIN 00786776050295