Amtech F1110 5 Piece 6.25mm (1/4") Titanium Coated high Speed Steel (HSS) Drill bit Set

Amazon

DURABLE: These 6.25mm (1/4") shank high speed steel (HSS) drill bits are heat treated and have a titanium nitride coating for excellent cutting performance VERSATILE: The set includes sizes: 1.5mm, 2.5mm, 3.2mm, 4mm and 4.8mm and can be used with most popular power tools, Manufacturer: DK Tools

Cazaar

The Amtech tin coated drill bit set are heat treated for maximum durability. They feature quick release, 1/4" hex shank titanium plated high speed drill bits for maintained cutting performance in sizes 1.5, 2.5, 3.2, 4 and 4.8mm. Can be used with most popular brand power tools.

Zoro Tools

DURABLE: These 6.25mm (1/4") shank high speed steel (HSS) drill bits are heat treated and have a titanium nitride coating for excellent cutting performance. VERSATILE: The set includes sizes: 1.5mm, 2.5mm, 3.2mm, 4mm and 4.8mm and can be used with most popular power tools.