Saiper 7pcs HSS Door Self Centering Hinge Hole Opening Drill Bit Set, 1/4" Hex Shank Doors Cabinet Hinge Drill Bits Tool Set (5/64'', 7/64'', 9/64'', 11/64'', 5mm, 13/64'', 1/4'')

Total J*nk They fell apart the first time I went to use them. Returned.

These things were pretty bad....One of them was missing a springAnother one had the hex screw loose, and no matter what you do to lock it down, the drill bit wont sit straight, thus interfering with the sleeve.The biggest one, seemed fine! But when i put it in my drill, it whipped around like a helicopter. Not straight at all!

I didn’t use this for almost a year after buying so no chance to return. The drill bit broke as I was drilling holes for a piano hinge. I’d look elsewhere.

Great tool for centering the holes In hinges. I wish I would have purchased this set of bits years ago.

Cheap, I guess I should have known better. gets stuck, does not adjust well, doe snot hold a depth well, bits are dull. Would not buy again.

Great bits! Exactly what I expect self centering bits to do. My only complaint is the size markings on each bit are almost impossible to read. Nothing an engraver couldn't take care of though.

very satisfied and would buy again.

They work great.

The media could not be loaded.  I opened the package and tried these bits one by one. 3 are of center as the drill spins the bit is like bend not straight. One bit the sleeve covering the drill bit is awful trends are crossed right out of the package. I was wondering to buy 3 bits from home Depot in a kit and decided instead to buy from Amazon. Now I regret it. Lukily the one bit I need to use for installation of my door hardware is good enough only. Rest are crappy. I don't recommend this product at all.

Well made and simple to use. With just a bit of practice you can drill perfectly cantered holes on hinges and other carport and cabinet hardware for professional results. No more movement of hardware with out of position holes. I’ve used these dozens of times without any problems. Position the hardware, drill the holes and install the screws. It’s that simple.

Obviously this manufacturer has poor quality control. Some reviewers say theirs worked fine. Others received defective bits. I am in the latter group. The bits are badly off centre. There is a very obvious wobble. No quality inspector would have passed these!There is also a design flaw. The tips are flat, not beveled. If the hardware for which holes are to be drilled is not countersunk, there is no way that the bit can be held on centre.I do not recommend these bits. I am returning mine.

Dieser Mist ist leider reine Ressourcenverschwendung. Die Bohrer schlagen, der Rückzugsmechanismus klemmt und die Anfasung der Zentrierhülse scheint reingebissen worden zu sein.Das einzig positive an dem Schrott ist, daß er kunststofffrei und zu 100% recyclebar ist, daher ab auf zum Altmetall.

I haven’t used these yet but right out of the package one of the drill bits was missing a spring, so I’m hoping this isn’t a sign of what is going to happen when I actually go to use them