Irwin Unibit drill

For drilling wide holes in thin sheet metal I bought Irwin Unibit drill bit. It is self-starting drill.

Irwin Unibit

For testing purposes I used steel sheet from ATX power supply box. Starting hole is a bit angular, next sizes are quite good. Only need to adjust the speed of the drill- to cut the steel, not grind.

Irwin Unibit

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