Corner Rounding End Mill: 13/16" Radius, 2-1/4" Dia, 4 Flutes, High Speed Steel MPN:182-6510

Combo Drill & Countersink: #4 is specifically designed for machinists who work extensively with aluminum alloys and other soft metals that require pilot holes plus countersinking functionality. The drill body diameter measures 5/16 with High-Speed Steel construction enabling users achieve smooth results when dealing with high precision tasks like aerospace or automotive engineering applications where accuracy counts; this unique combination offers time savings by eliminating need for purchasing separate tools just for accomplishing mentioned tasks while increasing efficiency at same time hence making it essential accessory available under one product rather than having multiple items sitting idle collecting dust on tool shelf thus fulfilling user's needs efficiently. Furthermore, machinists working on woodworking projects can greatly benefit from using these combination bits especially while creating pilot holes along edges prior joining materials together using glues, hence adding value proposition which otherwise would require extra investment when procuring standalone pieces thereby justifying its worth among potential customers belonging to various niches within broader machining & tooling domain.