5 8 Drill Chuck

drill chuck
A non-rotating Jacob's chuck fixing that holds twist drills, Forstner bits and spade bits for drilling holes in blanks on the lathe. Drill chucks may be mounted in the headstock or tailstock for drilling and feature a Morse taper arbor.

5
five: being one more than four
It is an irrational algebraic number. The first sixty significant digits of its decimal expansion are: which can be rounded down to 2.236 to within 99.99% accuracy. As of April 1994, its numerical value in decimal had been computed to at least one million digits.
five: the cardinal number that is the sum of four and one

8
Bookbinding is the process of physically assembling a book from a number of folded or unfolded sheets of paper or other material. It usually involves attaching covers to the resulting text-block.
eight: the cardinal number that is the sum of seven and one
eight: being one more than seven