DYMK300MK Click to Enlarge


  • A – 7mm (0.28in)
  • B – 19mm (0.75in)
  • C – 21mm (0.81in)
  • Body Width – 48mm (1.88in)

Model No. DYMK300MK

dudley® introduces 3-digit combination lock with key override function. This function gives school officials key control over ALL locks on that key system.


  • 3-digit easy to dial number combination lock with automatic scrambling feature to prevent reopening of lock
  • Key control feature achieves supervisory access: One key provides school officials immediate access to all locks matching the existing system or factory assigned
  • Includes combination chart to facilitate lock system administration
  • Patented BlockGuard┬« Anti-Shim Technology withstands attempts to violate the latch mechanism
  • Double-reinforced stainless steel body withstands abuse
  • Hardened steel shackle for extra cut resistance

Best Used For:

  • Lockers
  • Equipment Storage
  • Cabinets

How to Order

  1. Download order form .pdf
  2. E-mail your school's purchase order to neworders@mlock.com.
  3. Customer service will call you back to confirm order.

For more information, contact Customer Service at 1-800-227-9599.