Knew Concepts 5" Mk.III Fret Saw – Lever Tension

Combine lightweight handling with greater cutting reach and fast blade changes using the Knew Concepts 5" Mk.III Fret Saw with Lever Tension. Designed for jewelers, metalsmiths, model makers, and precision craftspeople, this saw provides a generous 5-inch throat depth while retaining the light, maneuverable feel of the Mk.III frame.

The cam-lever tensioning system is especially useful for piercing and other work that requires frequent blade changes. Flip the lever forward to release tension, reposition or thread the blade through the workpiece, secure the blade, and return the lever to the cutting position. When replacing the blade with the same size, the established tension can be restored without starting the adjustment process over.

With its combination of 5" reach and quick lever tensioning, the 125.005C is an excellent choice for larger jewelry pieces, decorative sheet metal, intricate pierced patterns, and precision projects that need more working clearance than a compact 3" frame.

Features & Benefits

• 5" throat depth provides greater reach for larger workpieces and deeper interior cuts
• Lightweight Mk.III frame for responsive, maneuverable handling
• Cam-lever tensioning provides fast blade release and resetting
• Particularly convenient for piercing and repetitive interior cuts
• Fine blade tension can be adjusted with the tensioning knob
• Fixed blade clamps provide a straightforward cutting setup
• Accepts standard 5-1/8" jeweler's and fret saw blades
• Excellent for jewelry fabrication, metalsmithing, model making, and precision cutting
• Suitable for larger pendants, cuffs, bracelets, decorative sheet metal, and pierced designs
• Blade clamps can be configured for left-handed use
• Made in the USA

Specifications

5" Throat for Greater Reach

The 5-inch throat gives the 125.005C additional working clearance compared with the compact 3" Mk.III.

That extra depth is useful when cutting:

• Larger pendants
• Cuffs and bracelets
• Decorative sheet metal
• Larger pierced patterns
• Sculptural jewelry components
• Model-making parts
• Deep interior openings
• Precision fabrication projects

The additional reach allows the blade to travel farther into the material before the workpiece reaches the back of the saw frame.

Fast Lever Tension for Piercing

The major advantage of the 125.005C over the screw-tension 125.005 is the cam lever.

Piercing often requires the blade to be repeatedly released, passed through a drilled starter hole, reclamped, and tensioned for each interior opening.

The lever makes this process much more convenient. Once the proper tension has been established, flipping the lever forward releases it. After the blade is repositioned and secured, flipping the lever back restores tension. When using the same blade size, further adjustment generally isn't necessary.

This makes the 125.005C particularly useful for detailed designs containing numerous interior cuts.

Lightweight, Maneuverable Mk.III Design

The Mk.III was designed around a lightweight frame that remains easy to control during detailed work.

That combination of low weight and a 5" throat is particularly appealing for jewelers who want additional reach without moving to the thicker, heavier-duty Mk.IV frame.

The 125.005C is well suited to both larger projects and fine detail work, including:

• Tight curves
• Decorative profiles
• Intricate piercing
• Interior cutouts
• Jewelry components
• Sheet-metal fabrication
• Model-making work

Fine-Tune Your Blade Tension

The cam lever handles the repetitive release-and-reset operation, while the tensioning knob provides fine adjustment when necessary.

This is particularly useful when changing blade sizes. Once the desired tension is established, the lever can release and restore that setting during subsequent blade changes of the same size.

The result is a useful combination of precise adjustment and fast repeatability.

125.005 vs. 125.005C

These two 5" Mk.III models share the same basic throat depth but use different tension systems.

The 125.005 and 125.005C share the same 5" throat depth and lightweight Mk.III design. The difference is the tensioning system. The 125.005 uses traditional screw tension, while the 125.005C adds a cam lever that makes releasing and restoring blade tension faster during repetitive piercing and interior cutting.

3" vs. 5" Mk.III Lever Tension

The difference between 125.003C and 125.005C is primarily throat depth.

125.003C – 3" Mk.III Lever Tension
Compact and highly maneuverable for smaller jewelry-scale work.

125.005C – 5" Mk.III Lever Tension
Provides two additional inches of throat depth for larger workpieces and deeper cuts while retaining the convenience of lever tension.

For users who frequently reach the back of a 3" frame, the 5" model provides considerably more working room.

Ideal For

The Knew Concepts 5" Mk.III Lever Tension Fret Saw is an excellent choice for:

• Jewelry making
• Jewelry fabrication
• Piercing
• Metalsmithing
• Silversmithing
• Goldsmithing
• Larger pendants
• Cuffs and bracelets
• Decorative sheet metal
• Intricate interior cuts
• Model making
• Precision fabrication
• Professional studios
• Jewelry and metalsmithing students

Frequently Asked Questions

What is the Knew Concepts 125.005C?
It is a 5" Mk.III Fret Saw with Cam-Lever Tension, designed to combine greater throat depth with fast, repetitive blade changes.

What does the lever tension system do?
The lever quickly releases and reapplies blade tension, making it much more convenient to remove and reinstall the blade during piercing.

Does the tension need to be readjusted every time the blade is released?
Normally, no. When reinstalling the same blade size correctly, returning the lever to its tensioned position restores the established setting.

Can the blade tension still be fine-tuned?
Yes. The tensioning knob allows fine adjustment when needed, particularly when changing blade sizes.

Does this model have swivel blade clamps?
No. The 125.005C uses fixed blade clamps. The 125.005CS is the corresponding Mk.III configuration with swivel clamps.

What blades does it use?
It accepts standard 5-1/8" fret and jeweler's saw blades.

Is this saw good for piercing?
Yes. In fact, repetitive blade changes during piercing are one of the primary reasons for the lever-tension design.

Can it be configured for left-handed use?
Yes. The blade-clamp arrangement can be reversed for left-handed use.

What is the UPC?
The UPC is 196943890126.

Where is it made?
It is made in the USA. 

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