Knew Concepts 8" Mk.IV Heavy Duty Fret Saw – Lever Tension & Swivel Clamps

Take on larger, more complex sawing and piercing projects with the Knew Concepts 8" Mk.IV Heavy Duty Fret Saw with Lever Tension and Swivel Blade Clamps. Combining an extra-deep 8-inch throat with high blade tension, rapid cam-lever blade changes, and 360° blade positioning, this premium saw provides exceptional reach and flexibility for jewelers, metalsmiths, model makers, and precision craftspeople.

The heavy-duty Mk.IV frame is designed to apply 50–60 pounds of blade tension, helping reduce blade vibration and providing a rigid, responsive feel while cutting. Its cam-lever tensioning system is designed for rapid, repetitive blade changes, making it particularly useful for detailed piercing work with multiple interior cuts.

What truly distinguishes the 124.008CS is the combination of its large 8" frame and swivel blade clamps. The blade can rotate through a complete 360° with positive click stops every 45°, allowing the cutting direction to change independently of the saw frame. This provides exceptional flexibility when working with large sheets, complex shapes, and projects where frame clearance would otherwise limit the cut.

Features & Benefits

• 8" throat depth provides maximum reach in the Mk.IV jeweler's saw family
• Heavy-duty Mk.IV frame provides a rigid sawing platform
• Designed for 50–60 lb of blade tension
• High tension helps reduce unwanted blade vibration
• Cam-lever tensioning allows fast, repetitive blade changes
• Excellent for intricate piercing and multiple interior cuts
• 360° swivel blade clamps provide exceptional directional flexibility
• Positive click stops every 45° make blade positioning repeatable
• Blade direction can be changed independently of the frame
• Particularly useful for large sheet metal and complex workpieces
• Aircraft-grade aluminum construction combines rigidity with manageable weight
• Weighs just 275 grams with blade
• Durable red finish
• Includes a #7 Fix Blue premium fret saw blade
• Made in the USA

Specifications

These specifications are confirmed by Knew Concepts' current product listing and model weight chart.

Maximum 8" Throat Depth

The defining advantage of the 124.008CS is its combination of reach and flexibility.

An 8" throat allows the blade to travel substantially farther into a workpiece before the material reaches the back of the frame. That makes this model particularly useful for:

• Large pierced designs
• Decorative sheet metal
• Sculptural jewelry
• Metal panels
• Oversized jewelry components
• Large model-making projects
• Deep interior cuts
• Complex fabrication
• Work extending well beyond the capacity of a conventional 3" saw

For jewelers and metalsmiths who routinely reach the limits of smaller frames, the 8" Mk.IV provides considerably more working room.

360° Swivel Blade Clamps

The CS designation is important because this isn't simply the standard 8" Mk.IV.

Its swivel blade clamps allow the blade to rotate through a complete 360 degrees, with positive click stops at 45-degree intervals.

This allows the blade and frame to point in different directions.

Instead of turning the entire workpiece—or stopping because the saw frame has reached an obstruction—you can change the blade orientation and position the frame where there is more clearance.

Go Beyond the Normal Limits of Throat Depth

This is where the swivel system becomes particularly valuable on an already-large 8" frame.

A conventional fixed-blade saw can only travel into the work until the back of the frame contacts the material. The swivel clamps allow you to change the relationship between the cutting direction and frame position.

For example, the blade can be oriented to continue cutting along a large sheet while the saw frame remains positioned away from the material.

Knew Concepts specifically developed its swivel system to give a jeweler's or fret saw capabilities that conventional fixed-clamp frames don't provide.

Excellent for Large Sheet Metal

The combination of 8" throat depth and a swiveling blade makes the 124.008CS especially attractive for larger sheet-metal projects.

It's a strong choice for:

• Decorative panels
• Larger pierced patterns
• Sculptural metalwork
• Cuffs and bracelets
• Oversized pendants
• Complex silhouettes
• Long cuts
• Architectural models
• Detailed fabrication

The large throat provides generous conventional reach, while the swivel clamps give you additional options when the shape or size of the workpiece begins interfering with the frame.

Heavy-Duty Mk.IV Frame

Knew Concepts designed the Mk.IV to handle significantly higher blade tension than its lighter Mk.III frame.

The Mk.IV is designed for approximately 50–60 pounds of blade tension, producing a stronger frame-and-blade system with reduced blade vibration compared with the Mk.III.

That gives this large saw a precise, responsive feel despite its generous 8" throat.

Fast Cam-Lever Blade Changes

The cam-lever tensioning system is designed for rapid blade changes, particularly during piercing.

Flip the lever forward to release the blade tension, reposition and clamp the blade, then return the lever to its cutting position. The tension setting remains consistent when resetting the blade.

That's especially useful when a complex design requires the blade to be repeatedly threaded through drilled starter holes for interior cuts.

Built for Intricate Piercing

A large frame isn't only useful for large exterior cuts.

The combination of 8" reach, cam-lever tensioning, and swivel clamps makes this saw exceptionally versatile for complex pierced work.

The lever simplifies repetitive blade changes, while the swivel clamps provide more control over frame position as you work through intricate patterns.

For detailed work involving dozens of interior openings, those features can make the sawing process much more efficient.

275-Gram Aircraft-Grade Aluminum Frame

Despite its large size and additional swivel-clamp hardware, the complete saw weighs only 275 grams with the blade installed.

Knew Concepts specifies aircraft-grade aluminum construction, allowing the 8" frame to combine high rigidity with much lower weight than its size might suggest.

That's especially valuable on an 8" saw, where unnecessary frame weight can become noticeable during extended periods of detailed bench work.

Premium Blade Included

Knew Concepts supplies the 124.008CS loaded with a #7 Fix Blue premium fret saw blade.

124.008CS vs. 124.008C

Knew Concepts confirms weights of 266.4 g for 124.008C and 275 g for 124.008CS.

Choose 124.008C if you want the large 8" Mk.IV frame, high blade tension, and lever tensioning with conventional fixed blade orientation.

Choose 124.008CS if you want all of those features plus the ability to rotate the blade independently of the frame.

Comparing All Six Mk.IV Models

Now that we've worked through this family, this would actually make an excellent comparison block across the collection:

Knew Concepts' current specifications confirm all six model numbers and weights.

3" = compact and maneuverable
5" = greater general-purpose reach
8" = maximum throat depth

Then:

C = fixed blade clamps
CS = 360° swivel blade clamps

Ideal For

The Knew Concepts 8" Mk.IV CS is an excellent choice for:

• Jewelry fabrication
• Large-scale piercing
• Metalsmithing
• Silversmithing
• Goldsmithing
• Decorative metalwork
• Sculptural jewelry
• Sheet-metal fabrication
• Large and complex workpieces
• Deep interior cuts
• Model making
• Precision fabrication
• Professional jewelry studios
• Jewelry and metalsmithing schools

Frequently Asked Questions

What makes the 124.008CS different from the 124.008C?
The 124.008CS adds swivel blade clamps that allow the blade to rotate 360°. The 124.008C uses fixed blade clamps.

How far can the blade rotate?
The swivel clamps provide a complete 360° of rotation.

Does the swivel system have preset positions?
Yes. There are positive click stops every 45°.

Why are swivel clamps useful on an 8" saw?
They allow you to change the blade's cutting direction independently of the frame. Combined with the already-deep 8" throat, this provides greater flexibility around large or awkwardly shaped workpieces.

How much blade tension does the Mk.IV provide?
The Mk.IV is designed for approximately 50–60 pounds of blade tension.

Is this saw suitable for piercing?
Yes. The cam-lever tension system is specifically designed for rapid, repetitive blade changes such as those required for piercing.

How much does the saw weigh?
Knew Concepts lists the 124.008CS at 275 grams with the blade installed.

Is it much heavier than the fixed-clamp 8" model?
No. The fixed 124.008C weighs 266.4 g, while the swivel 124.008CS weighs 275 g—a difference of only 8.6 grams.

Does a saw blade come with it?
Yes. Knew Concepts specifies that the saw comes loaded with a #7 Fix Blue premium fret saw blade.

Where is the saw made?
The 124.008CS is made in the USA.

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.