Drillpro 6pcs HSS 1/4" Hex Shank Countersink Drill Bit Set UNC or Metric Deburr Countersink Bits
A part of the review has been auto-translated.
I'm using these bits to easy build small projects out of aluminium on a way I can always unscrew (parts of) them. U can't easy solder / weld aluminium and using nuts on the bolts is not always doable. What can I say more? They do the job as promised.
J'ai utilisé le petit diamètre et il s'est cassé immédiatement. Il faut percer très lentement. I used the small diameter and it broke immediately. It is necessary to drill very slowly.
They came undamaged and look and feel well made, haven't had the chance to use them all yet. But if you take your time with them they should work just fine
sehr gute gewindeschneider. leider ist die senkfunktion nicht zu gebrauchen da sie hinten etwas zu breit sind und man somit das Gewinde zerstören würde. aber für den Preis echt top
All right, thank you very much arrived on schedule.
OK !!!
Fast shipping and nice product. Working as described. very useful
تحت التجربة المنتج يبدو جيد العرض صغير والطول ايضاا التجربة
Not tested but hope will work fine in future.
Good set of drilling and thrading tool. Very convenient to work faster