Oval Profile C5832 - Double cylinderFor use with locks accepting Oval profile cylinders. C5833 - Single cylinderFor use with locks accepting Oval profile cylinders. C5837 - Single cylinder with oval turnFor use with locks accepting Oval profile cylinders. C5834 - Single cylinder with small round turnFor use with locks accepting Oval profile cylinders. C5831 - Single cylinder with large round turnFor use with locks accepting Oval profile cylinders.