Explanation:

Spanners:

• Spanners are used for operating threaded fasteners, bolts, and nuts.
• They are made with jaws or opening that fit square on hexagonal nuts and bolts and screw heads.
• They are made of high tensile or alloy steel.
• They are drop-forged and heat-treated for strength.
• Finally they are given a smooth surface finish for ease of gripping.

• Open end spanners
• tube or tubular box spanners
• Socket spanners
• Ring spanners

• It is a type of socket spanner.
• Ratchet spanners feature a closed head with a multi-toothed ring featuring a ratchet function, allowing the user to tighten or loosen nuts and bolts without having to remove and re-position the tool.

Socket spanners:

• The socket is one of the fastest and most convenient of all the spanners.
• Sockets come in two sizes; standard and deep.
• Standard sockets will handle most of the work, while the extra reach of the deep socket is occasionally needed.