Car & More

Need to know what size receiver a Class 1 hitch uses? The answer is a 1-1/4 inch square opening, rated for up to 2,000 lb towing.

A receiver hitch uses a square tube to accept ball mounts, bike racks, and cargo carriers. Learn what a receiver hitch is and how classes and sizes work.

What is a tail pipe? Learn how this final exhaust outlet works, where it sits in your vehicle’s exhaust system, and what to watch for when it fails.

A 1/2-inch impact wrench delivers higher torque for heavy jobs; a 3/8-inch is lighter and better for tight spaces and smaller fasteners. For the full breakdown, see our best 1 1/2 In Wrench guide. Buying your first impact wrench means choosing between two common drive sizes, and the wrong pick makes every job harder. The

Learn 1 1/2 socket dimensions in inches and mm, the difference between socket size and drive size, and how to avoid common mistakes with large SAE sockets.

Learn what size exhaust pipe your engine needs based on horsepower—the 1-inch per 100 HP rule explained with charts and measurement tips.

Wondering what gauge is 1/2 inch? The exact answer is 12.7 mm, but body jewelry, sheet metal, and needles all use different systems.

Learn what a pipe coupler is, how it joins pipes, the types available, and how to choose the right size and material for your plumbing project.

Learn how to measure fuel filler hose diameter with calipers or string, plus the difference between ID and OD and common mistakes that cause wrong fitment.

Learn how to install exhaust pipe on your car or truck with the right lift, alignment, and tightening sequence for a leak-free result.