1 DIY materials can cost $100-$2,000 or more, depending on the type of materials and total length. 2  For example, DIYNetwork estimates it takes a weekend and $100-$250 to replace a section of ductwork with flexible ducting and install a return vent, rating the project difficulty at moderate to hard.
Bacon is delicious anytime! 12 slices is 63% of the pound of bacon, and since the package of bacon bits was only $1.89, you'd have to find raw bacon selling for $2.99 a pound to justify frying and Cuisinarting your own bacon bits. Good luck getting your food processor kashered, by the way.
Most drill bits for consumer use have straight shanks. For heavy duty drilling in industry, bits with tapered shanks are sometimes used. Other types shanks used include hex-shaped, and various proprietary quick release systems. The diameter-to-length ratio of the drill bit is usually between 1:1 and 1:10. Much higher ratios are possible (e.g., aircraft-length twist bits, pressured-oil gun drill bits, etc.), but the higher the ratio, the greater the technical challenge of producing good work.