Clerestory Skylight Pole Crank (truth hardware 30.4.760)
The #30.4 Clerestory Pole operates by means of a flexible shaft inside a tubular metal housing. This must be used with the Adapter #20550 which is sold separately.
The bearing bracket is for use with a pole operated clerestory or skylight window system. It usually requires the use of a sill extension to support the bracket and to provide for the 60 degree angle recommended for the universal joint with pole ring attachment.