Litensh 10pcs Screw Stud Extractors with Left Hand Cobalt Drill Bits Set, Drill Extractor Set Metal Damaged Screw Remover Drill Extractor Combination Set with Metal Case

Yes worked well,did the job in removing metal studs from a spoiler.

I have tried to save money and get those tools to remove a broken stud.My advice is .. buy from big and well known brand. The small drill bit got broken before to start the hole. Second one totally unable to drill the hole . Might be good for wood. But unuseful for metal. Quality and sharpness is very poor.I have put those aside and waiting for well known branded bits with guarantee quality

I bought these to do a job on a machine tool, for which I am waiting for replacement cap head bolts, in the mean time, I have done some practice on the bench with some spare similar bolts. The drills are left hand, so your driller must have reverse on it, next is, after drilling a hole into the bolt, the extractor does not get a purchase on it, I took measurements and found the drills are too small for the extractors to work. By using a drill from my own set, the next size up from the measurement I took of the end of the extractor, using the extractor in a tap wrench, I got a good purchase on the hole in the bolt, and am confident it will work.The drills are worth using, as they could loosen the bolt while drilling, then you need your own drill to open the hole up to size ready for the extractor. I found the smallest one best for an M5 cap head bolt, but be careful not to snap it on a really stubborn bolt, consider using the next size up, but this causes the head of the bolt to snap off, which may mean you can lift the part off the remaining stud, the remove using grips, or it could get you into deeper trouble. In short, nice extractors, shame about the drills!

not to bad

I bought this item to remove a sheared M5 bolt in a bike frame. And follow instructions. The smallest drill bit went through the centre of bolt fine, took about 30mins. You need to be patient. I then inserted and slowly turned the extractor with an adjustable spanner, which went into the bolt but didn't turn the bolt, it then snapped, and not under much pressure. Lucky I managed to knock the broken end out with a nail. I then tried a bigger drill bit and the bigger extractor this also snapped. So last resort I tried the bigger still drill bit. It got stuck and snapped but by then there was next to nothing left of the bolt and I was able to just knock it out. The material just doesn't seem strong enough for the forces involved. Maybe if the bolt was just hard to get to and not jammed tight this might do the job. But not for stuck bolts.

Drills are good, easy out snapped in the hole I drilled, I don’t know if it was my fault or the material but I didn’t do what I wanted it to

The stud extractors worked fine but the drills were blunt. Had to use another drill bit which I already had.

Potential the screws I was trying to remove were too tough. The drill bits hardly scratched the screws. Frustrating waste of time, for me.

Da provare in campo

La velocidad en la entrega muy bien, el packaging también, pero la broca que es lo importante se ha roto con el primer uso. (No es la primera vez que uso un a broca de este tipo)

J'avais foiré l'empreinte cruciforme d'une vie sur ma moto. Pas le choix que de la pièce pour l'extrait. Je n'ai pas eu de soucis. Il faut bien percer pour que l'embout d'extraction ait de la prise et ça fonctionne. Je recommande.

El producto buen calidad. Pero llegó un extractor desgastado totalmente que se ha usado.

trop fragiles:les forets s'abiment assez rapidement même s'ils sont plutôt solides. (pourtant j'y suis aller à basse vitesse en lubrifiant). donc forêts corrects mais pas au top.en plus les petits sont un peu souples donc ils se tordent et cassent si on force trop.Et les extracteurs: ils ont cassé dans le trou!Résultat ma vis de purge est bloquée et impossible à retirer parce que percer un extracteur cassé, ça coute 15 forets cobalt ou carbure et sans garantie de pouvoir ensuite extraire! ils feraient mieux de vendre des tarauds gauche avec un corps cylindrique plutot que conique car ça écrase la vis contre les parois et on n'arrive pas à dévisser sans casser l'extracteur!