A handy drill grinding device with collets for easy regrinding of twist drills with diameter 3 - 30 mm made of HSS or carbide. The device is easy to operate. The result is a cost-effective, and precise grinding of double-edged twist drills. The speed is infinitely variable. Everything is kept so simple that drill grinding is possible without prior knowledge - clean, fast and good. Easy to transport. With a sturdy metal housing. Diamond grinding stone with long life for a perfect grind. Complete equipment with ER collets inside the machine. The cutting edges of the drill are fixed in a defined position in the collet holder by means of the adjustment aid and inserted into the grinding holes in a predetermined sequence to grind the cutting edges with a short rotary movement of the collet holder.