Protex Safe SDL-400K Wall Mounted Drop Box With Key Lock
Protex SDL-400K Drop Box for Commercial and Agency Use
The Protex SDL-400K is a drop box built for retail counters, restaurants, bars, liquor stores, self-storage offices and property-management front desks that need staff to deposit cash and envelopes without holding a key to the contents. Protex Safe has manufactured this class of unit since 1991 from its plant in Irwindale, California, and every figure on this page is taken from Protex's own published specification for the SDL-400K rather than estimated.
Verified specifications
| Exterior Dimensions | 14” (W) x 15-3/4” (H) x 5-1/8” (D) |
|---|---|
| Door Clearance | 9-1/4” (W) x 8-5/8” (H) |
| Drop Slot Size | 10” (W) x 1/2” (H) |
| Door Thickness | 1/8” |
| Weight | 18.5 Lbs |
Specification source: Protex Safe's published data for the SDL-400K. Confirm critical dimensions against your own opening before installation.
Where the SDL-400K is used
This drop box suits retail counters, restaurants, bars, liquor stores, self-storage offices and property-management front desks that need staff to deposit cash and envelopes without holding a key to the contents. The pattern it solves is simple: reduce the amount of cash, keys or sensitive paperwork sitting in the open during a shift, without giving every member of staff access to what has already been deposited. Separating the person who deposits from the person who can open the unit is the control that matters, and it is the reason this class of product is specified in retail loss-prevention and agency property procedures.
The deposit slot measures 10” (W) x 1/2” (H), which is the dimension to check first. A slot sized for envelopes will not accept a zipped till bag, and that single mismatch is the most common reason a drop unit gets replaced within a year.
Installation and anchoring
At 18.5 Lbs this unit should be anchored. Protex supplies anchoring hardware and pre-drilled holes on units in this range. Anchor into concrete, masonry or structural timber — fixing into plasterboard alone defeats the purpose. For wall and floor models, confirm stud spacing, cavity depth or slab thickness before the install date, because a return for the wrong body depth is the most expensive mistake on these orders.
Buying for an agency, school or multi-site rollout
Security Pro USA supplies federal, state, local and commercial buyers, and can quote against a purchase order. For rollouts across multiple sites we can confirm keying arrangements, freight to each location and realistic lead time before you commit. Request a quote with the model number (SDL-400K) and the number of units, and we will come back with pricing, availability and delivery. Volume, agency and reseller pricing is quoted rather than listed.
Related products
Browse all Protex Safe models, safes and secure storage, gun safes and vehicle storage , or see request a quote, correctional security equipment, agency and government purchasing.
Frequently asked questions
What are the exterior dimensions of the Protex SDL-400K?
The Protex SDL-400K measures 14” (W) x 15-3/4” (H) x 5-1/8” (D) externally. Measure your opening against the exterior figure before ordering.
How large is the deposit slot on the SDL-400K?
The drop opening is 10” (W) x 1/2” (H). That governs the largest envelope or till bag that will pass through, so check it against what your staff actually deposit.
How thick is the steel on the SDL-400K?
Protex specifies a door thickness of 1/8”. Thickness is the single best indicator of pry resistance on this class of unit.
Does the Protex SDL-400K need to be anchored?
At 18.5 Lbs the unit is light enough to be carried away unanchored, so Protex supplies pre-drilled anchor holes and hardware. Anchoring into concrete or structural timber is strongly recommended for any cash-handling install.
Can we buy the Protex SDL-400K on a purchase order or agency terms?
Yes. Security Pro USA sells to federal, state, local and commercial buyers and can quote against a purchase order, including multi-unit and multi-site rollouts. Request a quote and we will confirm current pricing, lead time and freight.