Knew Concepts 3" Mk.III Fret Saw – Lever Tension & Swivel Clamps

Get lightweight handling, fast blade changes, and greater cutting flexibility with the Knew Concepts 3" Mk.III Fret Saw with Lever Tension and Swivel Blade Clamps. Designed for jewelers, metalsmiths, model makers, and precision craftspeople, this compact saw combines the light, maneuverable Mk.III frame with a quick-release lever tensioning system and adjustable blade orientation.

The swivel blade clamps allow the blade to be positioned straight ahead or 45° to either side, letting you move the rear of the frame away from the workpiece while keeping the blade aligned with the cut. This can open up cutting angles that are difficult or impossible with a conventional fixed-blade saw frame.

At just 130 grams with the blade installed, the 125.003CS adds directional flexibility while remaining exceptionally light in the hand.

Features & Benefits

• 3" throat depth for jewelry and small precision work
• Cam-lever tensioning for fast, repetitive blade changes
• Excellent for piercing and interior cuts
• Swivel blade clamps let you change the blade direction relative to the frame
• Blade can be positioned straight ahead or 45° left or right
• Helps move the rear of the frame away from the workpiece
• Useful for cuts that are awkward with a conventional fixed-blade saw
• Lightweight at only 130 g with blade
• Compact frame provides excellent maneuverability
• Ideal for jewelry fabrication, metalsmithing, model making, and precision cutting
• Made in the USA

Specifications

Swivel Blade Clamps for Greater Cutting Freedom

The defining advantage of the 125.003CS is the ability to change the blade orientation relative to the saw frame.

Knew Concepts’ Mk.III swivel system provides three indexed positions:

• 45° left
• Straight ahead
• 45° right

This lets you reposition the frame while keeping the blade aligned with your intended cutting path.

For jewelers and other precision users, that can be especially helpful when the saw frame itself starts interfering with the work.

Move the Frame Out of the Way

The swivel system is designed to let you swing the rear of the frame out of the way.

That can help when working around:

• Larger sheets
• Long or awkwardly shaped workpieces
• Decorative pierced patterns
• Bench obstructions
• Magnification equipment
• Areas where the conventional frame orientation limits access

Instead of forcing the workpiece to accommodate the saw frame, you gain more freedom to position the frame around the work.

Fast Lever Tension for Piercing

Like the 125.003C, this model uses lever tensioning rather than the screw-only system of the basic 125.003.

That makes repeated blade changes much more convenient during piercing and interior cutting.

Release the lever, reposition or thread the blade through the workpiece, clamp it again, and return the lever to the tensioned position.

This is particularly useful for:

• Pierced pendants
• Earrings
• Decorative cutouts
• Intricate sheet-metal designs
• Interior openings
• Fine jewelry components

Lightweight Mk.III Design

One of the biggest advantages of the Mk.III family is its low weight.

Knew Concepts lists the 125.003CS at only 130 grams with blade.

That makes it heavier than the fixed-clamp 125.003C, but still extremely light:

The swivel system adds only about 12.4 grams over the fixed-clamp 125.003C.

Compact 3" Throat

The 3-inch throat keeps the saw compact and easy to maneuver around jewelry-scale work.

This size is particularly well suited to:

• Earrings
• Pendants
• Rings
• Small bracelets
• Jewelry components
• Pierced sheet metal
• Decorative findings
• Model-making parts
• Fine craft projects

For users who primarily work on smaller pieces, the 3" frame offers excellent control without the extra size and weight of a deeper saw.

Excellent for Detailed Piercing

The combination of lever tension and adjustable blade direction makes this model particularly well suited to intricate piercing work.

The lever simplifies repetitive blade changes, while the swivel clamps give you more freedom to keep the frame clear of the work.

For a design containing multiple interior cuts or awkward angles, those two features complement each other extremely well.

Mk.III Swivel vs. Mk.IV Swivel

It is important to differentiate 125.003CS from the heavier 124.003CS Mk.IV.

The Mk.III 125.003CS emphasizes:

• Extremely low weight
• Compact handling
• Lever tension
• 45° left/right swivel positions
• Jewelry-scale maneuverability

The Mk.IV 124.003CS emphasizes:

• Heavier-duty construction
• Higher blade tension
• Reduced vibration
• Full 360° rotation with 45° indexed stops

Knew Concepts’ own instructions show that the Mk.III swivel system and Mk.IV swivel system are not identical, so the two product pages should not claim the same rotation capability.

125.003 vs. 125.003C vs. 125.003CS

This three-model progression is worth making very clear:

Choose 125.003 for the simplest, lightest screw-tension configuration.

Choose 125.003C if you want faster repetitive blade changes while keeping fixed blade orientation.

Choose 125.003CS if you want both rapid lever tensioning and the ability to reposition the blade relative to the frame.

Ideal For

The Knew Concepts 3" Mk.III CS is an excellent choice for:

• Jewelry making
• Jewelry fabrication
• Fine piercing
• Metalsmithing
• Silversmithing
• Goldsmithing
• Small sheet-metal work
• Intricate interior cuts
• Model making
• Precision craft work
• Professional jewelry studios
• Jewelry schools
• Serious hobbyists

Frequently Asked Questions

What makes the 125.003CS different from the 125.003C?
Both use lever tension, but the 125.003CS adds swivel blade clamps that allow the blade direction to change relative to the frame.

How far can the blade swivel?
The Mk.III swivel system provides positions 45° to the left, straight ahead, and 45° to the right.

Why are swivel blade clamps useful?
They let you move the rear of the saw frame away from the work while keeping the blade aligned with the cut, providing access to areas that can be difficult with a fixed-blade frame.

Does this model have lever tension?
Yes. The 125.003CS combines lever tension with swivel blade clamps.

Is it good for piercing?
Yes. Lever tension makes repetitive blade changes convenient, and the swivel clamps provide additional freedom when navigating detailed interior cuts.

How much does it weigh?
Knew Concepts lists the 125.003CS at 130 grams with blade.

Is it much heavier than the 125.003C?
No. The 125.003C weighs 117.6 g and the 125.003CS weighs 130 g, so the swivel version adds about 12.4 grams.

Is the Mk.III swivel system the same as the Mk.IV swivel system?
No. The Mk.III documentation specifies straight and 45° left/right positions, while the Mk.IV provides a full 360° rotation with indexed stops every 45°.

What is the UPC?
The UPC is 196943890096.

Where is this saw made?
It is made in the United States.

Micro-Tools makes every attempt to provide accurate information for each item. Actual packaging and/or specifications may be slightly different from the information and picture provided.