From The Anvil 4 and 5 Inch Long Backset Latches

4 Inch and 5 Inch Heavy Duty Latches for Door Knobs

From The Anvil recommends a 3", 4" or 5" latch with its knob sets. The 4 inch latch has an 82mm backset and the 5 inch a 107mm backset, so the knob sits further from the door frame.

All are heavy duty latches with an extra strong spring to return heavier mortice knobs to position. Most are CERTIFIRE approved and fire tested to FD-20/30/60.

4 and 5 Inch Long Backset Latches in This Collection

4" and 5" heavy duty latches in 13 finishes
For a horizontal case, see the horizontal locks and latches
For lever handles, see the 64mm and 76mm tubular latches
Shop by finish: black, brass, bronze, chrome and stainless steel tubular latches

4 and 5 Inch Long Backset Latches: Questions

Why use a longer latch with door knobs?

A longer backset moves the knob further from the edge of the door, which keeps your hand clear of the frame as you turn it. From The Anvil recommends a 3", 4" or 5" latch with its knob sets.

Are these latches suitable for fire doors?

The heavy duty latches are. Most are CERTIFIRE approved (certificate CF5531) and fire tested to FD-20/30/60, and From The Anvil describes the Black, PVD Brass and Satin Stainless Steel heavy duty latches as suitable for 30/60 minute fire doors. The standard tubular latches are not fire rated.

Trade Door Handles is part of T.H. Wiggans Ironmongery, an independent architectural ironmonger trading since 1976. We have supplied From The Anvil for decades, and both our T.H. Wiggans showroom in Kendal and our Trade Door Handles showroom in Carlisle have From The Anvil displays, so you can see the finishes before you order. Visit our showrooms or contact our team for help choosing.