![Amazon.com: BOSCH CO2143 1-Piece 1/4 In. x 4 In. Cobalt Metal Drill Bit for Drilling Applications in Light-Gauge Metal, High-Carbon Steel, Aluminum and Ally Steel, Cast Iron, Stainless Steel, Titanium : Industrial Amazon.com: BOSCH CO2143 1-Piece 1/4 In. x 4 In. Cobalt Metal Drill Bit for Drilling Applications in Light-Gauge Metal, High-Carbon Steel, Aluminum and Ally Steel, Cast Iron, Stainless Steel, Titanium : Industrial](https://m.media-amazon.com/images/I/41pHjRb7XbL.jpg)
Amazon.com: BOSCH CO2143 1-Piece 1/4 In. x 4 In. Cobalt Metal Drill Bit for Drilling Applications in Light-Gauge Metal, High-Carbon Steel, Aluminum and Ally Steel, Cast Iron, Stainless Steel, Titanium : Industrial
![HSS Cobalt Drill Bit Set 11/32 Inch 5Pcs M35 Co Twist Jobber Length Steel Metal Drill Bits - Amazon.com HSS Cobalt Drill Bit Set 11/32 Inch 5Pcs M35 Co Twist Jobber Length Steel Metal Drill Bits - Amazon.com](https://m.media-amazon.com/images/I/61UPN7mgzvL._AC_UF1000,1000_QL80_.jpg)
HSS Cobalt Drill Bit Set 11/32 Inch 5Pcs M35 Co Twist Jobber Length Steel Metal Drill Bits - Amazon.com
![tool identification - How to identify a wood drill bit from a metal drill bit - and does it matter? - Woodworking Stack Exchange tool identification - How to identify a wood drill bit from a metal drill bit - and does it matter? - Woodworking Stack Exchange](https://i.stack.imgur.com/Lmd7R.jpg)