17. It is a measuring tool used for measuring the distance between two symmetrically opposing sides. It can be like a compass with inward or outward facing points and the tips can be adjusted to fit across the points to be measured. A caliper B. folder ruler C. ruler D. square 18. Quality indicators of using screwdrivers A bade metal B. handle and bar attachment materials C. screwdriver tips D all of the above 19. The following are the guidelines to avoid hand tools injuries except A right tool for the job B. good condition C. proper storage D. watch your body 20. A tool used to tighten or loosen screws. A hammer B. Screwdriver C. wrench D pliers