Knob Locksets are the most common form of lock, and are the most widely used. Knob Locksets operate by physically turning the knob, and retracting the latch, allowing the door to be opened. In some cases it is difficult for some people to turn the knob and a lever lockset is used. They are available in various functions, designs, and finishes.
Corbin Grade 1 Knob Sets are ideal for demanding, high-use commercial, industrial and institutional applications with a steel chassis, and zinc dichromate plated for rust resistance.
Corbin Grade 2 Knob Sets are have precision manufactured mechanisms, and are zinc dichromated for corrosion resistance with a stainless steel latch bolt for long life.
Halsco Grade 1 Knob Sets are designed for use in high traffic and abusive situations where durability is the deciding factor. The lock chassis are constructed with cast retractors on bronze roller bearings, and have a 3 Hour UL/ULC fire rating.
Halsco Grade 2 Knob Sets are ideally suited for offices, apartment buildings, warehouse and manufacturing facilities, and have a 3 Hour UL/ULC fire rating.
LSDA Grade 1 Knob Sets are designed for heavy-duty commercial buildings such as schools, hospitals, factories and other public places. They are constructed from corrosion treated, heavy-gauge, cold-rolled steel mechanisms, and have a 3 Hour UL/ULC fire rating.
LSDA Grade 2 Knob Sets are designed for medium-duty commercial and heavy-duty residential exterior and interior doors for office, medical, public buildings, retail and government buildings. They are constructed from cold-rolled steel and zinc dichromate finish for rust and corrosion resistance, and are UL/ULC listed for fire rated openings.
Sargent Grade 1 Knob Sets are an exceptionally high quality security product with great strength and security, quiet operation and long life. They have heavy-duty construction with interlocking latch and aligning tubes for accurate alignment, smooth operation and reversibility of the lock without disassembly of knob and cylinder. The latch is a seamless brass tube with stainless steel springs for longer life.
Sargent Grade 2 Knob Sets are a highly styled standard duty lock, and ideally suited for fine homes, motels, apartment houses and small commercial buildings. The knob and rose are wrought brass/bronze.
Schlage Grade 1 Knob Sets are designed for heavy-duty commercial and institutional applications. They have been precision manufactured to exact tolerance, with concealed mounting screws, and ½” throw steel latch bolt with 1” housing.
Schlage Grade 2 Knob Sets are designed for medium-duty commercial and heavy-duty residential applications. They are constructed of high strength steel and plated for superior corrosion resistance and maintenance-free performance.