6PCS 1/2" HSS Black Gold Twist Drill Bits Set, 135 Degree Split Point, Jobber Metal Drill Bit, General Purpose for Use in Mild Steel, Copper, Aluminum, Zinc Alloy, Wood, and Plastic Boviisky Critical: Do NOT use on

Critical: Do NOT use on empty pipes

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offers the best - a mix of prior filtration performance and important certifications from the well-known regulatory body in the industry – NSF 42 and NSF 372 certificates

6PCS 1/2" HSS Black Gold Twist Drill Bits Set, 135 Degree Split Point, Jobber Metal Drill Bit, General Purpose for Use in Mild Steel, Copper, Aluminum, Zinc Alloy, Wood, and Plastic Boviisky Critical: Do NOT use onAbout this item Black gold high speed steel is the long lasting material when it comes to common drill bit materials, not only will the bit's structural integrity withstand tremendous heat and wear, but more importantly black gold bits can drill through tougher materials than common HSS bits. With a 135 degree split point, these drill bits will catch on the work surface with greater ease and not wander all over the surface making scratch marks. This