Professional grade three-flute countersink bits engineered from high quality High Speed Steel. Perfect for creating clean, precise countersunk holes in mild steel and various metals. Built for consistent results across general fabrication and assembly work.

2~6.3mm x 90° x 5mm shank,  3~8.3mm x 90° x 6mm shank,  3~10.4mm x 90° x 6mm shank,  3~12.4mm x 90° x 8mm shank,  3~16.5mm x 90° x 10mm shank,  4~20.5mm x 90° x 10mm shank,  4~25mm x 60° x 10mm shank, 4~25mm x 90° x 10mm shank,  4~30mm x 90° x 10mm shank,  4~35mm x 90° x 10mm shank,  4~40mm x 90° x 10mm shank