Cobalt SIS-350 is a safe with a smaller safe inside (Double safe security).
Features:

• Inner steel security safe on inside bottom
• Spring loaded active relocker bolt
• Accessories: 1 steel adjustable shelf
• Total door thickness: 3 1/4"
• Locking bolts: (4) 3/4" solid steel chrome plated active
• Fireproof: 2 hour fireproof
• Handle detent bolt
• Lock Type
  • Combination locks on both safes (Upgradeable to Digital Lock)
  • Secondary high security lock with (2) dimple cut keys
• (2) stationary bolts on hinge side
• Wall thickness: 3 1/4" 
• Outside Dimensions
  • Outer Safe: H 66", W 29 1/4", D 25"
  • Inner Safe: H 11 3/4", W 21 3/4", D 18 1/4"
• Inside Dimensions:
  • Outer Safe: H 55 1/4", W 21 3/4", D 18 1/4" 
  • Total Safe Storage Area: 12.7 Cubic Foot
  • Inner Safe: H 11 1/4", W 21 1/4", D 15 1/2" 
• Weight: 1102 lbs.