SJ62521 – 21mm 60° Countersink Burr, 6mm Shank Single Cut for Steel & Cast Iron Level with magnet Repeatability: 3μm

Repeatability: 3μm

or handheld drills

such as stainless steel and tool steels but it can also be used on some high tensile aluminum and bronze alloys

would be suitable as a half decent spare set or similar

SJ62521 – 21mm 60° Countersink Burr, 6mm Shank Single Cut for Steel & Cast Iron Level with magnet Repeatability: 3μmThe SJ62521 is a 60 countersink carbide burr with a 21mm head and 6mm shank, built for chamfering, deburring, and countersinking in heavy duty materials. The single cut fluting delivers smooth control and a clean finishideal for prepping holes, breaking edges, or cleaning up after drilling in steel, stainless, and cast iron. Whether you're chasing a clean seat for a fastener or knocking off a burr that doesnt belong, this burr gives you precision