Klein ToolsDK06 Knife, Serrated Stainless Steel Duct Knife for Flexible Duct and Board, with Sheath

I use this for work. I am very pleased with it and was bummed when mine went missing. So I ordered another one!

Update: 10/17/2014_I've now had this knife for about a month or so. It sits ontop of my table saw, in the sheath, ready to grab in the garage, as I stated before, it's intended use. I have cut boxes up for the trash bin, to make thins fit more efficiently, cut paracord, stabbed a large roach, opened cat food boxes, scrapped the algae and barnacles from a trim actuator and in general used it more than I thought I would. This Klein knife is a dream. Big and sound. Sharp and holds an edge well. I like it more now than before, when I wrote this review.I've used Klein tools for years and after seeing this DK06 Serrated Duct Knife, I ordered it for a Garage Utility knife. By utility, I mean I will use it for almost everything I'll need to cut, box opening, poking holes in, and with the Serrated edge, most rope, cardboard box tear down, duct tape cutting and of course, the occasional zombie throat slitting and brain stab. It is a hefty knife and will work well for about any knife use you may have. I have a fishing addiction, which I don't indulge in near enough and this will work well off the bank, shore, pier or boat as a general purpose bait knife or gutting blade, where a smaller knife would be found lacking. It fits the palm very well when gripping the rubber handle and cleans up well with soapy water. The stainless steel edge was not very sharp, but useable when first pulled from the puncture resistant sheath for the first time, but a little time with the Smith Diamond Sharpener, the edge was smoothed off and the edge became almost too sharp for a utility blade and cuts like a new blade in a box cutter. The tang goes through the handle to a end pommel, that can serve as a flat faced hammer when handled carefully, so as not to stick yourself in the eye or something. The knife does not have a guard at the blade, but the handle there forms a flared guard like end to the grip. If you need a garage knife, a bait cutting knife or just a Duct knife, this will serve you well. I like mine for the price and love it for being a wicked dagger shaped Utility dual edged zombie weapon, that cost me only $12.92 with free delivery, with my Prime Membership, which is due for renewal at a higher price than last year. Of course.

I abuse this tool, yet its still sharp for my hvac work. I love the metal tang at the bottom for busting a hole through duct.

I use mine for hiking and diving. Just add a little leash on it for ocean diving. This way ya don't have to go deep to recover and important tool to have when you dive.

This is an excellent inexpensive beater knife. It's made from some proprietary secret formula stainless alloy, and it does sharpen up reasonably easily to a very fine (but not quite shaving sharp) edge. The sharp side is an uninterrupted cutting edge, and the serrated side has sharp and nicely formed teeth, but not really of the wood cutting sort. It does and will cut wood, just not as easily as a single purpose wood cutting saw edge. Can't speak as to how well it holds an edge yet, but it is an industrial tool for insulation and ductwork so I expect that it will hold up reasonably well.The two-tone rubberized handle fits comfortably in the hand and is topped with a stainless steel buttcap. The black nylon sheath is nothing to write home about but it does what it's supposed to do. The only thing that I really dislike about the sheath is that the strap to secure the knife in the sheath uses a velcro closure, which in my experience just don't hold up well. I added a snap button closure to the strap and problem solved.This is a good general purpose hunting/camping/self defense knife, and I imagine that it makes a good insulation and ductwork knife as well. Well worth the reasonable price. Recommend.

For the price you likely will not be disappointed. I would not use it as an edc. the blade is too thin for a pry bar, but It slices and dices and in a pinch it will cut 4mm paracord easily. For the moment I'm using it as a stand in for a box cutter. It is cheap enough I might some time blunt the tip or make it a chisel tip thus converting it to a dive knife. I am not completely sold on the usefulness of the serrated edge. It maybe better to have it and not need it, than not have it and need it. I have no deal breaker complaints.

best deboxer, box eliminator out there. solid and useful. Don't cut yourself.

I bought one for my son to use in HVAC school. I was very surprised by the low price and couldn't believe the quality when it arrived. I bought one for myself and use it to pack stuff for online sales (i.e. cut styrofoam and cardboard etc...) and also use it for projects around the house. The knife is a beast!