The tools of technology class include marking tools like scribers, rulers, set-squares, divider compasses, punches, pencils, and markers. A scriber is used to make thin, semi-permanent marks on metalwork before machining. A graduated metal ruler measures lengths with millimeter graduations. A metal set-square has a sharpened 60° pointer used to mark points for holes. Divider compasses can inscribe circles or arcs and also measure distances. Punches are used to drive or imprint objects using a hammer. Pencils and markers contain solid pigment cores inside casings to mark without breaking or soiling hands.

1. The tools of
technology class:
Marking tools
Scriber
Graduated metal ruler
Metal Set-square
Divider compasses
Punch
Pencil
Marker

2. Scriber
A scriber is a hand tool used in metalworking to mark lines on work pieces,
prior to machining. The process of using a scriber is called scribing and is
just part of the process of marking out. It is used instead of pencils or ink
lines, because the marks are hard to see, easily erased, and inaccurate due
to their wide mark; scribe lines are thin and semi-permanent. On non-coated
work pieces marking blue is commonly used to increase the contrast of the
mark lines.

3. Graduated metal ruler
Used for measuring lengths to a moderate degree of accuracy. Graduations
on the ruler are usually millimeters and half millimeters. To be accurate, the
rule must be in good condition with flat, straight and true edges.

4. Metal Set-square
Hand tool that has shaped hardened steel pointer at one end sharpened to a
point approximately 60 ° is used to mark the exact place to be plotted in a
piece where necessary make a hole.

5. Divider compasses
A compass (or pair of compasses) is a technical drawing instrument that can be
used for inscribing circles or arcs. As dividers, they can also be used as tools to
measure distances, in particular on maps. Compasses can be used for
mathematics, drafting, navigation, and other purposes.

6. Punch
A punch is a hard metal rod with a shaped tip at one end and a blunt butt
end at the other, which is usually struck by a hammer. Most woodworkers
prefer to use a ball-peen hammer for using punches. Punches are used to
drive objects, such as nails, or to form an impression of the tip on a work
piece. Decorative punches may also be used to create a pattern or even
form an image.

7. Pencil
A pencil is a writing implement or art medium usually constructed of a
narrow, solid pigment core inside a protective casing. The case prevents the
core from breaking, and also from marking the user’s hand during use.

8. Marker
A marker pen, marking pen, felt-tip pen, flow, marker or text (in Australia), is
a pen which has its own ink-source, and usually a tip made of a porous,
pressed fibres such as felt.[1] A typical permanent marker consists of a
container (glass, aluminium or plastic) and a core of an absorbent such as
felt.