The Marks USA 5EU/10B-B4B10-LH Series 5 Oil Rubbed Bronze Left-Hand Mortise Lock Body Only is a high-security, Grade 1 mortise solution engineered for demanding commercial and institutional applications. Built for durability, fire safety, and ADA compliance, it delivers long-term performance with precision stainless steel components and robust internal construction.

• ANSI/BHMA Grade 1 mortise lock body tested for a minimum of 1,500,000 cycles and UL listed for 3-hour fire-rated doors.

• Left-hand configuration with keyed single-cylinder operation and no deadbolt, designed for maximum security applications.

• Series 5 mortise body with a 2-3/4" backset, latch, auxiliary deadlatch, and hardened internal components.

• Heavy-duty stamped steel case with zinc dichromate finish for corrosion resistance and long service life.

• ADA-compliant design compatible with thru-bolted trim and engineered for 1-3/4" standard door thickness.

• For more information visit Manufacturer's Website
  
  
  

• Models:
  Stainless Steel, Right Hand (5EU/32D-B4B10-RH)
  Stainless Steel Left Hand (5EU/32D-B4B10-LH)
  Oil Rubbed Bronze Left Hand (5EU/10B-B4B10-LH)