Goldfish Development. Baby goldfish are born much darker than they will be as adults. This may be because dark colors helps these small, vulnerable fish escape the attention of predators. With proper husbandry, the fish gradually change color and develop orange or gold scales. Fancy goldfish may develop color patterns including white patches.
Posts: 1,396. Re: Bits for hand drilling hardened steel. If you want to experiment with carbide drilling on the cheap, buy a carbide tipped masonry drill bit set. They are about $20 a set new, but I find them at garage sales for about $1 for the set all the time and that's why I use them.
How To Drill Hard Steel Video. Drilling steel or metal is harder than drilling wood. If you don't know how to drill steel, you can dull your drill bits quickly. Be sure to use a drill bit designed for steel, such as a cobalt bit. Wood drill bits have a special point that were not work with metal.Use a little oil on the steel to lubricate and cool the drill bit. Heat will dull the drill bit rapidly.ow To Drill Hard Steel Video. Drilling steel or metal is harder than drilling wood. If you don't know how to drill steel, you can dull your drill bits quickly. Be sure to use a drill bit designed for steel, such as a cobalt bit. Wood drill bits have a special point that were not work with metal.