SpyderSpyder 600043 Rapid Core Eject Hole Saw, 4.125-Inch

I do a LOT of soffit lighting. This thing lasts forever. I have tried Klein and a lot of other brands. They might last 5-6 holes on hardy plank, then they are useless. This has lasted me over a year and hundreds of holes ounched. Keep in mind this is NOT a fine tooth cutter, so its best to set you clutch to a lower setting and use high speed for best results.

Love it! Especially for cutting through lath and plaster.. Only thing that I wish I knew was it slides around a little more than my wood one.

Excellent performance. Used to install 4" metal dryer duct thru 6" of wood.

Worked awesome on wood and cement board. More controllable then a standard hole saw.

Great hole saw, cuts very fast, the core is easy to eject and it appears reasonably well made. The fact its comparably priced to a regular bi-metal hole saw is a huge bonus. Considering what it will cut through getting even one additional hole over what standard saws provide would be a huge benefit to me.

The major problem with this bit? Only FOUR cutting edges (needs MANY more to be effective)!Now this bit may be fine if your drill is in a press, jig, or boring machine, and you are cutting into a SMOOTH flat cement surface, and you were able to run water over it constantly to keep the heat down (on the bit), but if you think you are going to use this in your standard drill or hammer drill, on a rough surface, or on bricks (especially across multiple bricks and the mortar lines in between) - YOU are in for a surprise...and maybe a broken arm or wrist WHEN (not IF) the bit catches, and it will. Often.For a hole this size, you really need a jig. Or more cutting surfaces to the bitI really wanted this bit to work. Really i did. But after the drill nearly flipped ME heels over head -TWICE - when it would catch on the mortar between the bricks, and injuring my wrist on the 3rd try in ten minutes (and this but had barely scrored a circle in the bricks) - back in the box it went!To drill my 4" hole through my bricks for a dryer vent, i used a standard masonry bit it my hammer drill, drilled about 25 holes around the edge of the diameter i needed, then used a steel punch and small, hand-held sledge to chisel my way through the wall

Not impressed I'd spend the money on something more durable

This was far from the easiest thing I've ever used, but it cut a perfect, clean hole through my brick wall, plaster,mortar,and intermediary wood lath for installation of a dryer vent. It still has teeth, and I hope to use it again to ventilate my bathrooms. The quick eject feature actually works, too.Only thing I can say is that on my job, I had some difficulty getting both ends to meet. I drilled the inside part of the hole until it seemed to stop moving forward, then took off the hole saw, put a masonry bit that matched the pilot bit for the Spyder in my SDS rotary hammer, continued the pilot hole to the outside, then got up on a ladder and started drilling with the Spyder outside. But I think my bricks were still a little too deep to meet in the middle. So I used the same sds bit to drill some relief holes inside the big hole, near the edge, chiseled out some of the waste material, and started drilling again. Worked out fine in the end, though I was a hair off on perfectly straight, having started from two different sides.So, I guess note that a deeper core bit might do the job in one, but for the price, this thing is pretty great. Plus, since I have the pilot bit and quick eject thingie, I might start adding more Spyder hole saws to my collection. Pretty good stuff. Only reason it is getting 4 stars is I had a pretty tough time doing this for the first time ever, and I have no basis for comparison.

I used it to drill 28 pot light holes in plaster and gyproc lath and it worked as fast on the last as it did on the first. Will probably never need to buy another one. Haven't tried it on brick or concrete but I don't intend to.Buying the Arbor separately for $30 was a bit pricey though. If you want a cheap bit, don't get this one.

Good quality bit, good if you only have a couple holes to make in concrete or brick. Nice that you can cut through wood and other materials. Recommended for sure for any diy

Cut through fiber-cement easily and cleanly.

Low quality

The fit and finish is not great but it works very well on wood and siding.