The ABUS KE60 Euro profile thumbturn cylinders are suitable for wooden, aluminium & most PVCu doors. They have precision, mushroom pin and paracentric keyway which offer comprehensive anti-pick protection, also they have a hardened steel anti-drill spring & pin protection with 8 anti-drill pins in every keyway. How to measure a Euro Profile Cylinder: A Distance from internal end of cylinder (Not the thumbturn) to centre of cam B Distance from external end of cylinder to centre of cam Thumbturn Cylinders, Measurement K is always the thumbturn side of the cylinder, and the other measurement Z is external.