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Amazon.com: BOSCH CO2158 1-Piece 31/64 In. x 5-7/8 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
![DRILLFORCE (10 Pcs) 1/4in. x 4 in. HSS Cobalt Drill Bits, Jobber Length, Straight Shank, Metal Drill,Ideal for Drilling On Mild Steel, Copper, Aluminum, Zinc Alloy Etc. - Amazon.com DRILLFORCE (10 Pcs) 1/4in. x 4 in. HSS Cobalt Drill Bits, Jobber Length, Straight Shank, Metal Drill,Ideal for Drilling On Mild Steel, Copper, Aluminum, Zinc Alloy Etc. - Amazon.com](https://m.media-amazon.com/images/I/613RCQ+it0L._AC_UF894,1000_QL80_.jpg)
DRILLFORCE (10 Pcs) 1/4in. x 4 in. HSS Cobalt Drill Bits, Jobber Length, Straight Shank, Metal Drill,Ideal for Drilling On Mild Steel, Copper, Aluminum, Zinc Alloy Etc. - Amazon.com
![DEWALT 5/8-in 12-in Black and Gold Coated HSS Silver and Deming Twist Drill Bit in the Twist Drill Bits department at Lowes.com DEWALT 5/8-in 12-in Black and Gold Coated HSS Silver and Deming Twist Drill Bit in the Twist Drill Bits department at Lowes.com](https://mobileimages.lowes.com/productimages/ac0b2b19-6b7b-463a-bdad-6fe32b1cef1b/00723607.jpg)