What is the difference between a latch and a lock?

A latch holds a door closed using a spring-loaded bolt, usually operated by a handle. A lock provides a locking function (keyed or bathroom privacy) in addition to holding the door shut.

Which M.Marcus product should I use for a bathroom door?

Use a bathroom lock designed to work with a thumbturn and release set. This gives privacy without needing a key for everyday use.

Should I choose a 3 lever or 5 lever sash lock?

A 3 lever sash lock is commonly used for internal doors where moderate security is needed. A 5 lever sash lock is typically chosen where higher security is required.

Are M.Marcus locks and latches suitable for internal doors?

Yes. The range includes tubular latches, bathroom locks and sash locks commonly used on internal doors in homes and light commercial settings.

What finish should I choose for my lock or latch?

Match your lock and latch finish to your door handles and hinges for a consistent look. Popular options include satin chrome, polished nickel, satin brass, antique brass, matt black and bronze tones.

M.Marcus - Locks and Latches

M. Marcus Door Locks & Latches for Reliable Internal Door Security

Supplied by Trade Door Handles, trusted UK supplier of architectural ironmongery since 1976, with nationwide next-day delivery.

Shop our M.Marcus Locks and Latches collection for dependable internal door security and smooth day-to-day use. M. Marcus has been manufacturing quality ironmongery since the 1940s, known for consistent build quality and classic styling that suits both traditional and modern interiors.

What you’ll find in the M.Marcus Locks & Latches range

This collection includes popular specifications for homes, rentals, refurb projects and light commercial spaces, such as: 3 Lever and 5 Lever sash locks, deadlocks, Euro profile mortice locks, bathroom locks, plus a wide choice of tubular latches and deadbolts.

How to choose the right lock or latch

If you’re fitting an internal door handle with a latch, you’ll typically need a tubular latch. For bathrooms and en-suites, choose a bathroom lock to work with a thumbturn and release. For higher security areas (offices, stores, internal access doors), a deadlock or 5 lever sash lock is usually the better option.

For best results, match your lock case size and backset to the door thickness and your handle/knob setup, and ensure your chosen lock type suits your door handing and intended use.

Finishes to match your ironmongery

Choose from popular finishes including Satin Brass, Polished Nickel, Satin Chrome, Antique Brass, Matt Bronze, and Matt Black. This makes it easy to keep your locks, latches, handles and hinges looking consistent throughout the property.

Why buy M.Marcus locks and latches from Trade Door Handles

Trade-friendly pricing with a range suited to installers, landlords and homeowners
Fast, reliable UK delivery to keep projects moving
Helpful support if you need guidance on lock types, compatibility, or choosing finishes

If you’re searching for M.Marcus locks and latches, internal door locks UK, mortice locks, or quality door latches in matching finishes, you’re in the right place — this range is built to last and designed to fit cleanly into most internal door setups.