Ratchet screw driver

Offset screw driver

Philips screw driver

Stumpy screw driver

Fix the handle

Strike the metal

Strike the metal in all direction

Spread the metal in one direction

Size of the radius

Size of the diagonal

Size of the diameter

Size across the flat

Length of blade and width of tip

Width and diameter of the edge

Thickness and length

Shape and length

Crank pin

Gudgen pin

Piston

Cylinder bore