HSS Countersink 20.5mm with 1/4" Shank

Countersink cutters are used to create a chamfer around the rim of a pilot hole enabling the head of a countersunk screw to sit flush.

A 90 degree countersink is usually used for cleaning holes, enlarging holes or countersinking holes. For use in a wide range of materials such as aluminium, metal, plastic, steel, wood and brass. PTI HSS countersinks provide a smooth finish on a variety of materials.

• 90° flutes for use with machines and portable tools
• Reduced clogging
• Improve clearance
• Chatter free operation - less mechanical vibration
• Cost effective and efficient
• Made from HSS – this type of steel can withstand increases in temperature without losing its temper (hardness), allowing the steel to cut faster than high carbon steel