Rulers have long been made from different materials and in a wide range of sizes. Some are wooden. Plastics have also been used since they were invented; they can be molded with length markings instead of being scribed. Metal is used for more durable rulers for use in the workshop; sometimes a metal edge is embedded into a wooden desk ruler to preserve the edge when used for straight-line cutting. 12 in or 30 cm in length is useful for a ruler to be kept on a desk to help in drawing. Shorter rulers are convenient for keeping in a pocket.
A caliper (British spelling also calliper) is a device used to measure the distance between two symmetrically opposing sides. A caliper can be as simple as a compass with inward or outward-facing points. The tips of the caliper are adjusted to fit across the points to be measured, the caliper is then removed and the distance read by measuring between the tips with a measuring tool, such as a ruler. They are used in many fields such as metalworking, mechanical engineering, gunsmithing, handloading, woodworking, woodturning and in medicine.
A spirit level,bubble level or simply a level is an instrument designed to indicate whether a surface is horizontal(level) or vertical(plumb).Different types of spirit levels may be used by carpenters,stonemasons,bricklayers,other building trades workers,surveyors,millwrights and other metal workers,and in some photographic or videographic work.
Our retractable steel tape measures come in a wide variety of styles for many uses. Construction-grade steel tapes are accurate and durable, and ISO 9000 Certified — ideal for measuring planes and surfaces. Cases are made of ABS high-impact plastic and include a lock button for fixing tape in place. A number of our retractable steel tape measures can be branded.