A Safer Precision Cutter

Why Safety Professionals Prefer the MR100

Blunted Tip Mozart® Blade

Prevents punctures while remaining sharp enough for long-term tasks

Safety Knives For A Safer Workplace

Built for Durability and Ease

Ambidextrous body made of heavy polycarbonate for longevity and comfort

Patented Safety Features

Minimize risk of lacerations during handling, storage, and blade disposal

Highly Visible Green

Ensure a safety knife is never misplaced again.

Ideal For All Materials, Including

Deburring Plastic Parts

Including PC, PP, PET, Delrin, Teflon®, Tefzel, Torlon, Viton, etc.

Find Your Riteknife
Precision Cutting

For many different sample types

Find Your Riteknife
Other Precision Cutting

Including stencil type cutting operations

Find Your Riteknife
MR100 Auto-retractable Precision Cutter
MR100 Auto-retractable Precision Cutter

MR100 Auto-retractable Precision Cutter

Regular price $9.56

Safety knives this small and precise don't typically have the safety features needed for deburring and degating at scale—which leads to small accidental punctures and cuts that can add up.

The MR100 puts safety in your hands.

Developed in partnership with safety professionals, the MR100 features a retractable blade, blade locking mechanism, and tool-free blade change that ensure personnel can control the blunted tip blade no matter the task. With the familiar shape of a pencil or pen, this multi-skilled tool can solve a variety of precise cutting tasks while keeping personnel safe.

Product Specifications

Cutting Depth

25 mm


150 gms


180 mm x 55 mm x 19.5mm


Heavy duty aluminum

MR100 Accessories

Box of MR100 Replacement Blades

MR100s feature Mozart's® blades with a blunted tip—for safe guided cutting and long-term durability

Learn More

How to Use the MR100

Frequently Asked Questions about the AS100 and Auto-retractable Safety Knives

Why use an automatic retractable safety knife?

If you have a utility knife, it's important to keep safety in mind. This safety utility knife is a reliable tool because the guard will lock in place automatically over the blade after the cut is finished.

This makes factories and loading docks safer and more productive—you don't need to worry about cutting your body on an unguarded blade.

What is the blade extension?

25 mm

How does the safety feature work?

Once cutting is complete, the guard lock will automatically activate. It must be squeezed to be released.

Do you need any tools to change the blade?

No, just pull up the release lever

Why is the blade blunted?

To prevent accidental punctures

Can the AS100 be locked?

Yes, slide the side button forward to lock

Is the AS100 ambidextrous?


What is the AS100 made from?

Heavy duty aluminum

What does the AS100 cut?

The AS100 can cut single, double, and triple wall corrugated cardboard, heavy-duty rubber, stretch-wrap, plastic banding, gasket material, paper and plastic bags and is great for slabbing material off a roll.

What is a safety knife?

A safety knife is a type of knife that has special features such as protective guards, auto-retractable blades and blunt tips These tools are used to prevent lacerations and repetitive motion injuries.

Why are safety knives important?

Safety knives are important because they can help you avoid injury and make your work easier. Safety knives are designed to protect both the user and others around them from injury. If you have a regular knife instead of a safety knife, then there's a chance that someone could get hurt by accident if their hand slips while they're using it.

Why is it important to combine training with your safety knife purchase?

The importance of combining training with your safety knife purchase is that it helps you learn how to use your new tool in a safe and effective manner. When your employees are trained on how to use their new safety equipment, they will be able to perform their jobs safely and confidently.

How do safety knives protect people?

Safety knives protect people by making sure they don't cut themselves. The sharp edge of a regular knife can easily cut someone's skin and cause serious injury, but safety knives are designed to prevent this type of accident.

How do I evaluate which safety knife is most effective for my organization?

The best way to evaluate which safety knives are best for your cutting tasks is by conducting a free safety knife evaluation and discussing your specific situation with a safety cutting professional.

What are common injuries caused by unsafe knives?

The two most common injuries caused by unsafe knives in the workplace and in factories are lacerations and repetitive motion injuries.

Lacerations are the most common injury caused by unsafe knives in the workplace. These occur when a person's body comes into contact with a blade that is being used.

Repetitive motion injuries are also common with poorly engineered knives in the workplace. These occur when someone uses a knife repetitively for long periods of time.. This can lead to carpal tunnel syndrome, tendonitis, or other musculoskeletal issues.


Our experts are here to help you find the Riteknife that fits your needs and goals.