![Premium Gold Cobalt Twist Drills (1477490475042)](http://perrinwatchparts.com/cdn/shop/products/28-950-600_600x600.jpg?v=1595353455)
Premium Gold Cobalt Twist Drills Ideal for platinum, stainless, silicon-chrome and chrome-nickel. These drills will last 30 times longer than standard drills. Sold by pack of 10. Highly recommended that you use water or coolant when working with these drills.