These 4 Plug Followers will fit virtually all of the rim or mortise cylinders currently in use. They are made of centerless ground bar stock.
No. SUT-0 (.395" / 10mm Diameter)
No. SUT-1 (.495" / 12.6mm Diameter)
No. SUT-3 (.500" / 12.7mm Diameter)
No. SUT-10 (.550" / 14mm Diameter)