I would recommend them for fairly heavy-duty jobs
593043
These work really well! I would recommend them for fairly heavy-duty jobs, but the best part about them is their strong, toothed grip.
1296881
Heavy duty. They worked well on my denim jeans when other cheaper ones had clasps that wouldn't stay fastened.
3047723
Used these quite a bit.  They work well.  The drill is not as powerful as I would like.  It has stopped on some difficult projects.  It has plenty of power for general purpose jobs (drywall, attaching lumber).
209404
Very heavy duty and fairly easy to change the blades. It's OK for doing a little work but they're very heavy so if there's alot I have to prune I'll use something else.
4829771
A lot heavier duty than I imagined they would be.  They have deep crevices all over to contain the water from melting ice etc.  They cover my Camry's floorboards completely and have stood up well so far.  I would not hesitate to recommend. These are a good value for sure.
216198
Work very well for my needs, which mostly consist of punching hard/stuck pins out of my guns for thorough cleaning.
1616056
The five stars given here are for the product.  The description could use a little work, however.

Despite appearances, these items cannot be broken easily by hand - these definitely live up to the "heavy duty" description given, and would be perfect for certain uses.  We'll be keeping a pair of wire cutters around for detaching ours... they seem to be just about right for the job.
3843000
You know... I bought these as a bit of an impulse buy really.  I only needed one specific size for a specific job, but I got the set for the heck of it.  I'm surprised now how many times I go for the hex shank bits.  I use them primarily with a Dremel Drill Driver (awesome little tool by the way) and I'm really really glad I bought them.  Light duty only for my purposes.  I'm not saying it can't handle heavy duty... just saying I haven't used them for more than light duty jobs.

Over a year later and my only problem with these is that I managed to lose one.  My bad.  None have broke.  I use the 1/8" a lot, but only into plastic.  However, it is glass reinforced nylon so I expected some dulling yet it is still fine.  I'm not going to say these are the best quality bits in the world, but the convenience of the hex shank and the fact that they are more than pulling their weight... I stand by my original review and reinforce that its certainly worth the money.
2583966
just what i needed, heavy and they fit my dodge van pretty well, just a tad narrow, but not enough to make a difference.. grippers on the bottoms keep them from moving all over while you drive and get in and out and they clean up very well with a hose and broom
3948580
They're great, they get the job done and they look good doing it. If buy them again if I needed to.
3987881
As many others have stated, these are handy for when you need to add a hole or two to a belt, and that is exactly why I bought them.  They do the job and are sharp enough to get the job done without causing damage to the leather.  I won't say they are super high quality or that they would work in a commercial setting, but for the average person who might use them a couple of times a year for various projects they should work just fine.

Before I had these I used a basic awl to add new holes in leather but that is less than perfect as it doesn't remove anything... it just punches a small hole.  I also tried drilling a small hole, but that can tear the leather and leave an imperfect sized or shaped hole.  This is the way to go.  The right tool for the right job.
4092500
While not being "refined" with somewhat rough finish, they did the job intended -- that of opening heavy duty brass chain links
3276008
Seem reasonably well-built. I have some shoe trees that were more expensive and are sturdier and operate more smoothly, but in the end I imagine these will perform the desired task equally as well.
3812091
These were exactly what I needed, they don't feel heavy duty though and they are kind of light weight.  However, they do the job and work fine.  The paint is a pleasant color and the springs and bearings are all in good working order.  If you want something heavy and solid metal look elsewhere, but for the average job, these will work fine.
1638434
I wouldn't recommend this product for large jobs but outstanding for smaller jobs.
1410620
These are not fancy or flashy or ergonomic. What they are are simple tools to get a job done. I used them to rebuild my bicycle hubs. They are built sturdy enough for lightweight jobs.
2601822
I got these as a gift for a friend of mine and she loves them. They look nice, they're fairly sturdy, and they do their job well