4pcs 1/4" Shank Flush Trim Bits Set Top End Bearing Router Bit Set, 1/4" 5/16" 3/8" 1/2" Cutting Diameter Milling Bits for Woodworking Tool

These cutters arrive individually packed and certainly look good. They cut very well with a decent finish. The only thing standing between them and 5 stars is a quality control issue. I first used the 1/4" cutter in a small router. After about 2 minutes the guide retaining screw fell out and released the guide bearing. This did some damage to the workpiece which fortunately was not serious. Once I found the screw and bearing they were undamaged and I re-fitted them. On checking the other cutters I found one more loose screw. They are easy to tighten but on further examination none of the screws had thread lock compound on them. In 40 years of using routers this is the first time I have had a router cutter do this - hence the lost star

Not that accurate for fine work. Slight play in the bearing caused a few nicks in the workOk for the money if ...I wouldn’t use for fine laminate

These router bits are simply awful and not fit for purpose. It's a shame I have to give one star.I made one trim cut and it left a significant lip, suggesting the bit wasn’t cutting flush. Having checked for any user error I measured each bit with an imperial micrometer.Here are the results:1) Described Cutter size (Inches) 1/4 bitDecimal 0.250Actual bearing size 0.275Actual cutter diameter 0.2652) Described Cutter size (Inches) 5/16 bitDecimal 0.3125Actual bearing size 0.3145Actual cutter diameter 0.3013) Described Cutter size (Inches) 3/8 bitDecimal 0.375Actual bearing size 0.375Actual cutter diameter 0.3854) Described Cutter size (Inches) 1/2 bitDecimal 0.500Actual bearing size 0.511Actual cutter diameter 0.492Only one dimension is what it should be.Three of the bits cut under size, leaving a lip rather than a flush cut.And worse still, one of the bits had a 10 thou over-cut, which if used, would have destroyed any piece being worked on.Needless to say, these are going back and a lesson to self: DON’T BUY CHEAP IMPORT CRAP.

Only used one bit so far but given the cost its worked fine and stayed sharp so far. pretty good quality for the price, not used extensively as yet so not sure on life of the bits yet

I was gobsmacked, I ordered it 5 hours ago and it came in time for me to use one of them. The trim bits do a clean job.

These are nice and sharp and gave a good finish. I'm not expecting them to last as they are Chinese imported but so far so good.

Did the job required without any fuss, a good range of sizes at a good price.

The bearings on these bits melt almost immediately, sending shrapnel through the workshop. Bit after bit, the bearings never made it through the first cut before melting and flying apart, incidentally sending the cutter into my template. These are dangerous items. Not to be unfair to a nation, but these seem to fit the stereotype of “cheap Chinese junk”. And if the manufacturer suggests I was somehow using these improperly (which I highly doubt), perhaps they should label the product in the language of the country in which they’re selling them.