Meihejia 4pcs Square Hole Mortise Chisel Bit Set 1/4, 5/16, 3/8, 1/2 Inch

Sometimes I have to wonder what people are thinking when they write reviews. I see several 1-2 star reviews on these "Mortise" chisels that obviously haven't got a clue what (or how) these are used for.First off, these are Mortising Machine Chisels and as the name implies, they are used in a Mortising Machine or in a drill press with a Mortising Attachment! I'm still trying to figure out How some of the reviewers thought they could install these Without the Mortising Attachment. The picture clearly shows that there is a bit and a chisel so I'm a bit dumbfounded as to how or where with a standard Jacob's Chuck a person could determine that they could attach these as a set - last time I checked there is only one hole that can hold anything other than a chuck key.Enough about the uninformed or wannabe woodworkers who have purchased this item without knowing how to use them - oh, by the way, there is this really large data repository called YouTube that I'm almost positive has a video or three on using a Mortising machine or chisels on a drill press.I purchased this item from Amazon Warehouse as used, like new and received Only the 9 & 6.5mm sizes so I am unable to comment on the other two sizes - more on this later. Both chisel sets came in individual hard (reuseable) square plastic tubes - the ones like large taps or mandrels come in. Upon inspection of the chisel sets I could see the ground & polished cutting edges had been factory sharpened both on the bit & the square chisel. I'm guessing the reviewer that received dull & unsquare items got a bad batch - or I got lucky with my set. I attached these to my Mortising Machine and made some test mortises and had very crisp corners.For people that are new to mortising chisels, when you make a mortise you Only cut 2 or 4 sides (Never 3). Think of it this way make the first square hole (4 sides) leave a small space - I typically try for about 1/2 the size of the chisel, e.g., for a 1/2" chisel leave a 1/4" space - cut another square hole (4 sides) continue to the end of the mortise making sure the last square hole is 4 sides and lined up at the end. Go back to the first "space" (that is now a wooden bridge that is smaller than the width of the chisel) and cut the bridge (only 2 sides - top & bottom) continue cutting out all the spaces (bridges) and you should have a very nice mortise that may need a little bit of bottom cleaning. Now that the Mortise is made, make the tenon to fit - never make the tenon first and expect any brand of mortising chisel (or hand chisel for that matter) to fit the tenon properly. With all of the Mortise & tenon joints I've made in my life, I don't think I could ever tell you "exactly" how big the mortise (or tenon) was, I can say it was "about" 3/8 or about 1/2" but I've never checked sizes on the chisels. Why, you might ask, well, I use the "fixed" size chisel and create a tenon to match - much easier to take 1/64th off a tenon than trying to chisel out 1/64th from a mortise.Back to the Amazon warehouse issue. I can't fault the chisel set manufacturer for not having sent all of the chisels, the 2 that came worked well. I will take up the issue of the missing chisels w/Amazon and then decide if I'll return them. Maybe the warehouse worker took the 4 piece set literally - two chisels & 2 bits 😐.Bottom line, these chisels appear to be good (not great) quality, for the casual user they should get you through a project or three so I would reccomend these for that kind of application - I wouldn't recommend these for a commercial shop environment.Hope this helps!

These are junk. They must be ground square by hand. Possibly by a blind toolmaker. Expect that you will have work to do just to get them cutting. If you want undersized holes this is for you, out of shape from the start I didn’t get to use one till I put a few hours in. I think I am going to use these by hand at least I can finish with a chisel. If you don’t know how to sharpen one of these, then you will get lots of practice. Good luck, better luck would be to find one from a manufacturer that has a square in the shop or even just eyes.

Didnt know I needed additional part for my drill press. So these are no good to me

Sometimes, being square ain’t such a bad thing. Feeling trapezoidal? These will square you right up!

This item requires another rig for use which is not stated in the ad.

can only be used in drill press or mortising machine. wanted to use in drill - NO GO. Good product, overall.

Horribley advertised. Did not state can only be used with drill press. Also you have to buy a another bit so they will work

Very sturdy