These spindle cam suit Millenco Mantis 1 series door locks with 117mm/86mm PZ.
Millenco Lockcases are not available but the usaul fault is the spindle cam shattering or the lift block which sits behind the cylinder breaking.
This part number is for 1 spindle cam but we do also sell a repair kit which contains a Spindle cam and Lift block - Part Number - MILM1REPKIT
Please note these spindle cams do not suit Mantis 2 series with a 95mm/65mm PZ or the Mantis 3 series with a 92mm/62mm PZ