Kolvoii Screw Extractor Set & Bolt Extractor Kit, Left Hand Drill Bit Set, 39 Pcs Multi-Spline Bolt Remover Tools, for Removing Broken, Stripped Bolts, Screws, 35#CR-MO 6542/4341 HSS Steel Cobalt

I’ve had tons of broken bolts around the house, and this tool has made my life ten times easier. It works just like it should, saving me time and frustration every time I need it. Durable, reliable, and definitely worth having in the toolbox.

I ordered the Kolvoii 39-piece extractor set because my car was giving me the silent treatment thanks to a pesky sheared star screw on the engine splash shield. What does that mean? No oil change for me—boo hoo!But then, like a knight in shining armor, the extractor set arrived ahead of schedule and without the kind of excessive packaging that makes you feel like you’re unwrapping a prize from a cereal box. It came in a sturdy container that could probably withstand a minor earthquake. Each piece was clearly marked with its size, and the container was organized so well that even Marie Kondo would have shed a tear of joy.The extractor worked like a charm on that worn-out star screw and even helped with other sad, neglected screws lurking around my house, probably wondering if they’d ever be useful again. I’m glad I picked this set and waited patiently for its delivery. The price was reasonable, too, considering they’re well-made and likely to be a once-in-a-lifetime purchase. Let’s hope I don’t misplace them, or else I’ll be back to square one, crying over my poor, abandoned star screw!

These worked well in getting a couple of seriously stubbornly stripped bolts off of a transmission I was removing. Although one of the drill bits broke during the process. Hence the 4 stars.

There is a good assortment of various sockets, drill bits, and extraction bits. Unfortunately, the reverse drill bits are very brittle and broke on my first use trying to extract a M4-.07 screw. Very little pressure was put on the bit, but it broke very easily. Now I need to figure out how to replace it as my set is no longer complete. If the seller is reading this could you please contact me, I would like to discuss a replacement for the reverse drill bit that shattered.

The drill bit worked fine but not the extractor. Broke immediately. Not strong enough to pull any bolts that snapped off. I tried both types. The bit broke off inside the bolt so now I have to take the car to a mechanic to have it drilled out and re-tapped/threaded

it is a decent, sturdy tool kit that is always needed but never around, so I decided to get it and add it to the box.

Works exactly how it’s supposed to for the price it will save you a bunch of time getting those pain to get out bolts so you can completed you project

Great set still holding strong got me out of many sticky situations best set I've ever bought from easy broken bolts to hard broken bolt extractions in 120 degree working environment