For drilling holes in steel that's 1 8 or thicker, use cutting fluid or a multi purpose oil. Lubricating the bit reduces friction and heat buildup, which makes drilling easier and your bits last PineCar P3967 Hammerhead Pre Cut Design Alum A Lub Multi Purpose Lubricating Cleaner Spray, 9.4 oz, Rust Remover for Metal and Vinyl Walmart.com Pinewood derby Wikipedia Graphite Pinewood Derby
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