In order to do all I need I have a dozen or more sets. The ball end are most used with T-handle second most. Also need a set of security Allen wrenches with the hole in the end. Then size run from pocket watch to D9 Caterpillar ROTC, etc tools get out of hand. I have 6 double and triple stack roll away chests at work of hand tools and then two at home since most of the motorcycles live in the garage. A couple of socket drive sets to use with torque wrenches is most important for me. Been an over tightener all my life. Amazing how much less force is needed to tighten a nut or bolt than it feels. I have torque wrenches in inch/ounces, inch/pounds, foot/pounds, newton/meters and so on. One is rated from 1 to 3 inch/ounces in tenths of an ounce and the big wrench with 10 foot T handle designed for two men will torque to 8,000 ft/lbs. Nothing to me like knowing whatever I twist is at manufactures specs.