SUNSKY 10 PCS M35 Cobalt-Containing Twist Drill Bit High-Speed Steel Double Head Metal Steel Plate Expansion Hole Drill, Model: Double Head 4.5mm Double Head 4.5mm

Material: high speed steel containing cobalt

Outer blade angle: 135 degrees

Scope of application: stainless steel, aluminum alloy, metal pipes, iron plates, etc.

Specification: 3.0/3.2/3.5/4.0/4.2/4.5/5.0/5.2/5.5mm

Length: about 4.4 cm/piece for 3.0/3.2mm, about 4.8 cm/piece for 3.5mm, about 5.3 cm/piece for 4.0mm, about 5.5 cm/piece for 4.2mm, and about 5.8 cm/piece for 4.5mm , 5.0mm is about 6.2 cm/piece, 5.2/