JIECHENG Bi-Metal 4 inch Hole Saw with Arbor Mandrel for Cutting Wood,Cornhole Boards,Drywall,Plasterboard,Plywood,Steel,Aluminium,Brass,Copper,Zinc,Tin,102mm

Did exactly what I bought it for, drill 6 whole in 1/2 plywood. Locked in place, as some others do not as I read in reviews of other products.

The threaded hole for the center bit was tapped & crooked. My my corded DeWalt Drill 3/8 chuck wasnt big enough.

Due to the fact that has no pin support the center part with strip out if you’re trying to drill through something other than very thin material or drywall type stuff. The Allen wrench supplied for the drillbit itself is not the right size. Therefore it’s strips. The drill bit falls out of the pilot because it cannot be tightened correctly. Did not work and was returned.

Needed to cut one hole in my soffit foot an exhaust fan. Did the job, though if I needed to cut more holes I’d buy something of better quality.

Used it to make a feral cat house. Cut right through a double sided cooler & didn’t leave rough sides to the cut.

Well it makes holes

This will not fit either of my black and decker 3/8 drills. I contacted the company and this is their response: Hello ，thank you for your feedback, we dont find your video or picture , but i send you some pictures in attachment of the 3/8 arbor, you can see we measure the distance between two sides, please note it is two sides not two corners. this is the customary standard in the hardware tool industry. another question is to see if your chuck of electric hand drills is marked 3/8, sometimes the chuck is not standard too. so there are many reasons for this. in fact we are company in China, no branch in USA, so we cant send you another pcs for test. but if youd like to buy this stronger arbor, maybe can be better, but not sure if it fit your chuck, the link is : https://www.amazon.com/dp/B081VQQQT4?ref=myi_title_dp . and another way is that if can not use it, please return this item to amazon. sorry for it. and hope you have a nice day! regards Jack The three pictures showing the measurements are the pictures mentioned in the response. The key point is the measurement of the arbor is not point to point, its side to side. It might fit most 3/8 chucks but not all. Good luck.

Not worth paying something that wont work. Blades are weak.

Worked perfect , spring came off but still worked perfect

Made the cornhole without any issues or splinters