Milescraft 5342 6pc. Drill Stop Set - Includes 3/16, 1/4, 5/16, 3/8, 7/16, and 1/2-Inch

You need to tighten these against the flat spots of the drill bit, not into the groove of the drill bit. That makes it a little tricky when trying to get them to tighten at a specific height but overall, these work great and did exactly what I needed them to do!

I used this to assemble a multi section Toyota transfer case per Marlin Crawlers recommendation. This stuff worked really great, and I'm not sure how I've survived so long without it. It held the paper gaskets perfectly in place during assembly so I didn't misalign a single bolt hole. Especially useful for the rear transmission seal since I didn't drop the transmission to do the job. This is so cheap compared to the whole job, it is just a must have for any gasket work.I wish I had this when I did the water pump, but I will use it next time! So far my Transfer case has no leaks. I was concerned about excess build up inside the case that could clog oil orifices, but I think this stuff will either stick where it's put or disperse harmlessly in the oil. Really excellent product.

These work well but you better take the time to tighten it on the land of the bit.It can easily slip if it is not set tightly on the center of the bit.Stay away from the groove, and make it tight.Nothing worse than drilling deeper than you wanted too because it slipped.

These work good on wood bits but will not work with a hammer drill and masonry bits.

Fits drill bit perfectly. From hand drill to drill press they stay firmly attached

Simple, easy to use, and they work. For years I've used the eyeball or piece of tape method to try to drill holes to a certain depth. Bought these and I wish I'd gotten them when I first got a drill. As others mentioned, make sure the set screw is on the lands, not in the flutes. Only issue is that they don't come with any sort of case. I used a ziplock bag. Not the end of the world.

A little tricky to get the set-screw secured in a way that it actually holds the collar in place, but once you find the sweet spot and crank it down, it will usually stay and do what it's supposed to, although the collars typically end up cocked. The set-screws are rather loose in the collars, which doesn't help the tightening down problem. Fair for the price, nothing special.

This is much more accurate than trying to use masking tape.

these come in handy in situation where drill depth is important. they are easy to use, are durable (all metal construction), and come with their own little allen wrench (saves time/money). also I believe they are dipped in chrome to prevent rust which is a nice bonus.

Atendeu ao uso, aplicação de cavilhas

The media could not be loaded.  Están bien para la relación precio-calidad, son baratas, por eso compré dos sets por si se llega a barrer una.La he usado con brocas para madera y jala bien, ya que no se forza mucho la broca. La use también con una broca de concreto para hacer un pequeño hoyo pequeño para un taquete, no sé si ya con brocas más grandes por la vibración se barra o se suelte.Yo la recomiendo más para agujeros pequeños.

Fueron muy prácticas al elaborar mis muebles

I wish these had been supplied with the Milescraft dowelling jig. However, since they did not, I had to get these. They are quite essential. They work well. I did notice that the set-screw is larger than one I had been loaned by a friend of mine, which was most likely from a knock-off brand, as it seems cheaply made (I cannot verify this tho). These collars do slide on the appropriate drill bits with little to no play in them, and once the set-screw is tightened, it doesn't move at all. I am pleased with this purchase, with one exception. It is a very minor detail, but it would have been even better, had each collar been stamped with the size it goes with. That way, when I'm looking for a specific collar size, it's not all guess-work and I could save myself some time. I might find a way to engrave some kind of marker myself... we'll see.