Sockets

The drive must fit the square end of your ratchet or torque wrench. It usually is 1/4 inch, 3/8 inch or 1/2 inch. Look for the mark on the tool. For light tasks a 1/4 inch drive is enough. For wheel bolts or heavy fasteners choose 1/2 inch. A 3/8 inch drive is a good middle ground for general workshop work.

A six-point socket has six contact surfaces. It grips the bolt head completely and spreads the force evenly. This stops the corners from wearing. A twelve-point has twelve contact points. You can place it on the bolt in more positions, which helps in cramped spaces. The downside is its thinner walls. It may slip on a worn bolt. Use a six-point for heavy or damaged fasteners.

The socket size is the width across the opening. It matches the distance between two opposite flats of the bolt head. Use a caliper to measure across the flats. Read the value in millimetres or inches. A socket that fits exactly has no play. If unsure, test the socket on the bolt before working.

Yes, as long as the drive of the socket fits the square drive of the torque wrench. A 1/2 inch socket set fits a 1/2 inch torque wrench. Always respect the maximum torque of the socket. For 200 Nm you need at least a 1/2 inch drive. Smaller drives may break under high loads.

Keep sockets clean and dry. After use wipe them with a clean cloth. Apply a light oil film to prevent rust. Store them in a drawer insert or on a hanging rail. This protects the chrome finish and helps you find the right size quickly. Avoid aggressive chemicals that can damage the surface. Simple care makes them last.