Single (Sometimes called Half) Oval Cylinders operated by key on the one side.

Double Oval profile cylinders operated by key on both sides of cylinder. Equal lenght on both sides of the cam

Oval Key & Turn Cylinders with a Key on one side and a turn on the other.

Suitable for use in situations that require thumbturn operation from one side only.

Suitable for use in situations that require thumbturn operation from one side and emergency access from the other.