Thumb Turn Plug for MUL-T-LOCK Hercular Single Cylinder Deadbolt @ MUL-T-LOCK-ONLINE.COM
Removable thumb turn for security and fire safety
Mul-T-Lock Cronus High Security Grade 2 Single Cylinder Dead-Bolt w/Thumb Turn 2-3/8 or 2-3/4 Adjustable Backset for Commercial and Residential Metal Or Wood Doors (Stainless Steel) - Amazon.com