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DDAL29
D and D Hardware
UL Listed
Stainless Steel 304
SSS, PSS, PVD, AB, AC ,MB
Silver,Black, Golden, Antique Brass, Antique Copper
Wooden Door, Metal Door
T/T, L/C, D/P, Western Union
Jiangmen /Guangzhou / Shenzhen , China
200,000/Month
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The dead bolt on a classroom door is operated exclusively from the outside using a key. This allows an authorized person, such as a teacher or facility manager, to lock the dead bolt from the exterior, securing the room and preventing entry without a key. This feature is essential for protecting classroom equipment, materials, and the overall security of the space during unoccupied hours.
From the inside, the lock features a turn mechanism that retracts the dead bolt, allowing occupants to open the door freely at any time. However, this interior turn does not project or extend the dead bolt, meaning the door cannot be locked from within. This design is a critical safety requirement: it ensures that in an emergency, students and staff can always exit the classroom quickly without needing a key, while still maintaining security against unauthorized entry from outside.
Product Overview
Product name | Single Cylinder Deadbolt Classroom Dead Lock for Educational Institutional Doors-DDAL29 |
Product Model | DDAL29 |
| Color | Silver, Black, Golden, Antique Brass, Antique Copper |
Lockcase | Heavy Gauge Stainless Steel for Corrosion Resistance |
Deadbolt | Solid Casting SUS304, Project 1"（25.4mm） |
Latchbolt | Solid Casting SUS304, Project 3/4"（19mm）,Anti-Friction Two Pieces and Can be Reversible |
Auxiliary Latchbolt | Stainless steel |
Forend | Stainless steel Grade 304 |
Strike | Stainless steel Grade 304, Non-Handed |
Door Thickness | 45mm to 55mm As Standard |
Backset | 2-3/4" (70mm) |
Center to Center | 3-5/8" (92mm） |
Door Handing | Left Hand and Right Hand |
Packaging & Shipping
MOQ | 100PCS |
Package | 1pc /poly bag,white box / color inner box,Standard export Carton . |
Sample time | 5-7 working days |
Production lead time | 30-35 days normally |
Shipping Port | Jiangmen , China / Shenzhen , China |
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