What is the best commercial mortise lock?

The Schlage L9000 is the most widely specified. The Sargent 8200 has the highest cycle count at 14M+. The Corbin Russwin ML2000 is heavily specified on government projects. All are ANSI/BHMA Grade 1.

What is the difference between Grade 1 and Grade 2 locks?

Grade 1 locks are tested to 1,000,000+ cycles with higher impact resistance. Grade 2 are rated for 250,000 cycles. Grade 1 is standard for commercial exterior doors and high-traffic areas.

What is the best door lock for school classrooms?

The Schlage ND78 classroom security lock allows locking from inside without opening the door, meets ADA requirements, and maintains fire egress compliance.

What is the difference between Schlage ND and ALX?

ND is Grade 1 with 1M+ cycles and electrified options. ALX is Grade 2 with 250K cycles and modular chassis at lower cost. They share the same lever designs.

What is the most common commercial door closer?

The LCN 4040XP is the most widely specified surface-mounted commercial door closer in the US, covering sizes 1-6 and all three mounting types.

What locks are used in hospitals?

Grade 1 mortise locks on high-traffic doors, cylindrical locks on patient rooms, electronic access with audit trails on pharmacy and restricted areas.

How much cheaper is wholesale vs retail door hardware?

Wholesale pricing on commercial door hardware is typically 20-40% below manufacturer list price. Project quotes for large orders can be even lower.

Security Door Controls SDC 931-KP-4U EntryCheck Digital Keypad & Controller Single Gang

$1,226.00

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Brand: SDC
SKU:: 931-KP-4U
Condition:: New

$1,226.00

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Additional Information

Manufacturer	Security Door Controls
Model	931-KP-4U
Dimensions	Controller: 7-1/2"H x 5-1/2" W x 2-1/2"D (191 x 140 x 64mm) Keypad: KP-4U Single gang 3 x 4 matrix
Finish	Stainless Steel
Operating Temperature	-40° F to +120° F (-40° C to +49° C)
Memory	Non-Volatile Memory All programming is maintained during a power outage.
Main Relay	Two Relay Outputs While one relay output may be designated for momentary door unlocking, the second relay output may be designated for one of the following: Two Door Operation; Latching; CCTV Activation or Doorbell Activation.
Exit Toggle	Request-to Exit The REX input provides remote unlock capability by, a remote station, exit switch or exit sense bar.
Number of Users	5 Users
Voltage Input	12 or 24 VAC/VDC
Warranty	1 Year Warranty
Weight	3.5000