When a steel ruler is used correctly, it can be used as an accurate measuring instrument. The graduations are engraved and evenly divided to have a high contrast to improve readability. The accuracy can be read to within 0.5mm.
The screwdriver is designed to be ergonomic and wear resistant. The tip has been hardened for optimum durability. The VDE (Verband der Elektrotechnik) certified screwdriver is insulated to withstand 1000V and is suitable for work on electrical equipment.
Carpenter pencils are easier to grip than standard pencils, because they have a larger surface area. The non-round core allows thick or thin lines to be drawn by rotating the pencil. Thin lines are required for precision markings and thick markings are needed to mark on rough surfaces