BOSCH CO2159B 1-Piece 1/2 In. x 6 In. Cobalt M42 Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum

top class

Quality sharp metal steel drill bits for the workshop. Bosch= Good Quality.

Normally use cheap drill bits but all the ones I had really struggled when drilling out a bolt. These ones made my life so much easier and saved me a lot of time. Always use a bit of cutting oil/spray when drilling metal and these are still sharp after use and hardly a scratch on them.

At the time of buying it wasn't obvious they were standard size not metric. They still seem like quality bits and drill steel like butter.

Lot of money to not even touch it’s intended target doesn’t drill hard bolts

This is a comprehensive range of sizes in a sturdy case - with the added benefits of being Bosch-built, of Cobalt steel, so they should stay sharper, longer. When drilling steel or harder materials, it is always worth getting the drilling speed right for the work - and using copious quantities of drilling lubricant (if necessary), to cool the drilling area. Thus especially applies when you have invested in a set like this.

Quality material.

Was soll Ma da sagen Bosch expert halt Qualität einfach fantastisch 🤩

Las mejores brocas, que puedes encontrar en el mercado para perforar, el hierro forjado y el acero inoxidable

Impeccable - de très bonne qualité - pas besoin de forcer - à voir à l'usage mais je reste confiante

Punte di ottima qualità, le uso sia per ferro o acciaio, e anche resina visto che lavoro nel nautico. Unica cosa che avrei dovuto notare prima, ma nulla di ché, le punte sono in pollici. Ma alla fine lavorano perfettamente e posso trapanare quasi tutto come burro