10.4MM CSK ULTIMATECUT 4S RUNATEC HSSE 90° RUKO COUNTERSINK

ULTIMATECUT Countersink 4S (DIN 335) – 90° 

Boost performance and precision with the ULTIMATECUT 4S countersink. With four cutting edges (instead of the usual three), this innovative design reduces axial and radial forces, delivering smooth, chatter-free results while extending tool life up to 3x and cutting work time by up to 50%.

Ideal for both hand-held drills and CNC or pillar drilling machines, the 3-flat shank prevents slipping for optimal power transfer. The advanced RUnaTEC coating offers exceptional wear resistance and fast, clean cutting—even on tough materials like heat-treated steel.