From The Anvil Brass 5 Lever Sash Lock British Standard

From The Anvil Brass 5 Lever Sash Lock British Standard

91120  2.5 inches Case, 44mm Backset
91121 3 inches  Case, 56mm Backset

The backset is the distance from the edge of the door to the spindle.

Complies with British standard . Patented easy latch reversal system and simple spring strength adjustment.
20mm solid steel anti-thurst, anti-saw, anti-drill bolt throw. It comes with a stainless steel box striker and all the necessary fixing screws.

Sizes:

ANV-91120
Case Depth: 64mm
Backset: 44mm
Case Height: 112mm
Centres: 57mm
Forend Length: 166mm
Forend Width: 26mm

or

ANV-91121
Case Depth: 76mm
Backset: 56mm
Case Height: 112mm
Centres: 57mm
Forend Length: 166mm
Forend Width: 26mm

91122 – Rebate Kit for use with the lock above, required when fitting a pair of door one closing onto the other ie. french doors – sold separately