Knob handle piece with plate number 155

Knob handle piece with plate number 155 that is available in the following versions:

155 HR Pair knob with a plate piece of internal room doors with 75 mm center.
155 HRL Pair knob with a plate piece of internal room doors with 90 mm center.
HY 155 Knob with unitary plate for external doors - entrance doors. (Right or left)
and colors matte nickel and matte term.

To understand which center we want in pairs knob with a plate piece of internal room doors (type HR type the HRL), we have to measure the distance between the frame of the knob and the position of the cylinder 75 mm or 90 mm.
The knobs with monolithic slabs for external doors - entrance doors are spaced from the handle frame to the center position of the cylinder 85 mm.
The right and left to the handles with one-piece plate is determined by the position of the hinges when we look at the door from the inside. So when the hinges are located on your right hand the knob we need is right, when they are located on your left , the handle is left.
The package includes the knob (pair or single), rod and screws.