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Description
Crescent Duct Knife CTDKNIFE 14 Inch Dual Sided Serrated Smooth Blade Hand Tool (4.5 Blade HVAC Insulation Flexible Fiber Acoustic Liner Cutter Sheath)Dual Cutting Edge Steel Geometry for Rapid Flex Duct and Insulation Fabrication The Crescent CTDKNIFE is a 14 inch professional HVAC duct knife engineered with a 4. 5 inch dual sided steel blade containing a serrated edge and a smooth razor edge. This specialty manual hand tool is designed to cut through flexible acoustic ducting core matrix material and thick fiberglass insulation blankets without tearing or fraying the substrate. The structural
Dual Cutting Edge Steel Geometry for Rapid Flex Duct and Insulation Fabrication
The Crescent CTDKNIFE is a 14-inch professional HVAC duct knife engineered with a 4.5-inch dual-sided steel blade containing a serrated edge and a smooth razor edge. This specialty manual hand tool is designed to cut through flexible acoustic ducting core matrix material and thick fiberglass insulation blankets without tearing or fraying the substrate. The structural configuration features a dual-material ergonomic grip optimized for heavy glove compatibility, an overall weight of 1.1 pounds, and an included heavy-duty injection-molded protective locking sheath for secure tool belt transport across high-density jobsites.
Best Used For:
- Flexible Duct Cutting: Ripping through core wires, outer vapor barriers, and interior insulation sleeves on flexible HVAC duct lines.
- Fiberglass Insulation Slicing: Separating bulk foil-faced fiberglass batts and acoustic wall liners cleanly to exact dimensional parameters.
- Trunk Line Installation: Trimming insulation wrap during rough-in phases across attics, crawlspaces, and narrow ceiling joist frameworks.
Key Performance & Safety Features
- Dual-Cut Blade Matrix: Alternates a razor-sharp straight edge for clean sliding slices and a robust serrated edge for tearing coarse fibrous materials.
- Precision-Ground Geometry: Specialized satin-finish steel taper reduces physical user drag forces, lowering cutting fatigue during high-volume field jobs.
- Dual-Material Ergonomic Handle: Non-slip molded composite handle optimizes hand fit and contact parameters for wet, oily, or heavily gloved environments.
- Compact Leverage Balancing: Tailored handle-to-blade ratios ensure a closer center of gravity for maximum downward mechanical pressure.
- Injection-Molded Safety Sheath: High-impact structural protective case snaps securely onto tool belt webbing to avoid unintended exposure scratches.
What's Included
- (1) Crescent 14-in. Dual-Edge Duct Knife
- (1) Injection-Molded Protective Sheath
Technical Specifications
| Brand | Crescent |
| Model Number | CTDKNIFE |
| Product Type | HVAC Duct Knife |
| Overall Tool Length | 14.375 Inches |
| Blade Length Dimensions | 4.5 Inches |
| Blade Edge Material | Steel Alloy |
| Surface Polish Finish | Satin |
| Edge Profiling Configuration | Dual-Sided (Serrated / Smooth Razor) |
| Handle Construction Type | Dual-Material Overmold Comfort Grip |
| Included Base Storage | Injection Molded Locking Sheath |
| Overall Weight Parameter | 1.1 lbs. |
| Warranty Classification | Full Lifetime |
| UPC Barcode Reference | 037103346391 |
Pro-Tip: When cutting wrapped insulation blankets, pull the knife backward across the foil face utilizing the smooth edge to create a uniform score lane before pushing through with the serrated edge to cleanly slice internal glass fiber without binding the blade core.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Ordinary People, Extraordinary Experiences
Format: Hardcover
A beautiful and interesting coffee table book. Whether you're a believer or not,the many photos of the Swiss countryside are lovely, and the photos and remarks from ordinary people like us are interesting and moving. Experiencer or not, a worthwhile purchase.
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Reviewed in the United States on August 7, 2025
★★★★★ 5
I read the quotations first
Format: Hardcover
Of all the stories I have read about those who experienced extraterrestrial life, and all those who told those stories, Billy Meier's story is the most authentic. This book is a beautifully written and photographed narrative of Meier's relationship with various people from the stars, over a period of time. Billy himself reminded me of my best friends in the 1960's and 70's--quiet and kind. But the most remarkable part of this book, apart from the extraordinary photographs, is that there are quotations from the extraterrestrial visitors themselves, which are worth reading, in order. Yes, you might still not believe this happened, but you cannot help but absorb insights in those quotations. You will not forget them.
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Reviewed in the United States on July 17, 2024
★★★★★ 5
A Civilization in Transition: Can Humans Make the "Jump" to Hyperspace?
Format: Hardcover
Though there is ample evidence to suggest that humanity has been visited by "off-planet" beings or relatives since as far back as any recorded history in stone or on paper, with the advent of technologies bringing us closer to an enlightenment or a destruction, UFO/UAP events seem to becoming more frequent. And more accepted. When UFO...CONTACT FROM THE PLEIADES v I and II were first published 45 years ago few people had a personal computer in their homes let alone any digital technology whatsoever. There were gains in human rights protections along with ecological study and the awareness of the importance to "love our Mother." (Earth) So it may not be so unreal to consider that one specific human, a farmer in rural Switzerland was chosen for multiple contact events and allowed to capture photographs, audio recordings, films and even metallic samples from OP visitors for the purpose of helping humanity expand its consciousness to the next level.
This reissue tells such a story with vivid photography, detailed analysis and skilled reporting having used the most advanced non-civilian equipment available at the highest levels in its day. Furthermore, time has only affirmed that none of the photographs or video from the Billy Meier case have proved to be fake or forged in any known way.
This is the book for searchers interested in the "nuts and bolts" of ufology. And yet...
Whether you believe in UFOs or off-planet visitors is really beside the point here. The deeper point - and the not so hidden purpose revealed through the messages given to Billy Meier from Semjase, a Pleiadean traveler who contacted Meier over 100 times in the 1970s - is to consider if each one of us is capable of suspending disbelief long enough to be curious, which takes an open heart. And if we open our hearts, how can we do harm to ourselves, our planet, or others in the universe? And if we can achieve "do no harm" what else could we achieve? Hyperspace? Telepathy? A humane civilization where no one goes hungry or homeless? The point is whether or not we are ready, collectively, to expand our consciousness.
After reading this book, I want to take that leap!
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Reviewed in the United States on May 3, 2024
★★★★★ 5
A wonderful book !l
Format: Hardcover
No doubt the subject of UFO's and ET's is a challenging subject. But the Billy Meier story is certainly one of the very best. This book is masterwork that warrants the highest rating. The photos are extraordinary and the story line is superb. Buy a copy or several for yourself and for gifts .
A. very happy customer ....indeed.
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Reviewed in the United States on October 22, 2024
★★★★★ 5
Amazingly well written
Format: Hardcover
Nice book. Pictures and honest interviews and reports via credible down to earth persons.
They don't weigh you down with hundreds of pages to read. Well done
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Reviewed in the United States on September 15, 2024