From The Anvil Black Gothic Curved 92mm Lever Handle set 33764

Back plate size 248 x 43mm
Bac kplate thickness 5mm (useful when determining size of cylinder)
Handle length 115mm
Euro Lock Centre 92mm (measure from spindle to lock)

Suitable for multi point locking systems only

Handle is unsprung allowing upward (locking) movement.

These are not suitable for normal sash lock applications due to the lock centre size – these are available with part number 33136