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On the smallest countersink bit, the drill shank broke instantly. But I used the next countersink bit to complete my composite deck with no problems.It did outlast the Ryobi countersink bit I bought. Was a bit dissapointed.
As is ususal with Bosch products, this is a well made tool. It makes countersinking much easier.
Ryobi bits appear brittle and have been known to shatter under load, the torque of today's high volt drivers proving too much for their inferior metal. Of these three, Dewalt's offering is the most durable, just not as durable as Bosch. Then there's Bosch.Largely Austrian produced now-a-days, the metals used appear superior to all other brands commonly available in the US. No more wobbles, no more jams, no more bits disengaging surreptitiously, and no more stripped screws or broken bits.
It's not just for drivers anymore.Bosch manages this quality and a versatility unmatched by competing systems, including the coveted "Vix" style self-centering hinge bits that equal the original but offer quick change ease. After all, I'm a nice guy, but you ain't gettin' my Bosch. The bits used seem to be of the highest grades, at least equal to the reknowned caliber of the Hilti brand [the Rolls Royce of power tools and bits] made for the tradesman, but with pricing few tradesmen can afford and that attracts thieves like flies to sugar. Another "quick-change" system.There are many other quick change bit systems available, most notably from Dewalt, Ryobi, and Hitachi. Ryobi and Hitachi systems appear extremely similar to each other, both offering mediocre performance and systems that are prone to jamming or not engaging properly after repeated use. What's in a name.There are many copy cats of these three, but upon close examination, only Dewalt appears to be of distinct manufacture. In the end.The Ryobi and Hitachis are somewhere in a landfill, but my Dewalts remain in my toolbox, the ones on hand when the inevitable "tool borrower" appears.
Kudos to taking the quick change system to a new level of competence and precision, providing the most stable design and execution, the greatest ease of use, and the most durable drill bits that equal straight shank performance and hardened driver bits that rival the best. Dewalt is also the more secure fit, but not with the clamp-like action of the Bosch. But even more fascinating is their "clic" system, providing a design and manufacture so well executed it defies any movement while engaged but smoothly disengages with ease when desired. But there's a catch.There's only one problem with Bosch's quality; if you make a mistake, you can't blame the tool.AX~ Bosch QualityThe Bosch system appears to be produced with the highest tolerances on the market, and with metals of such integrity that repeated use has no noticeable effect on either its fit or function.
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