A combinational template and scale ruler to accurately draw three-dimensional (3D) drawing is disclosed. The scale ruler is a transparent plate, which includes a plurality of apertures disposed at a middle portion. Each aperture defines a substantially continuous linear aperture corresponding to a visible edge of 3D shape. A plurality of indicium is juxtaposed around each aperture to facilitate drawing of the 3D shape. The plurality of indicium is inscribed in surface of the scale ruler. The plurality of indicium is graduated to define angle and size factor of the aperture to facilitate drawing of the 3D shape. The plurality of indicium further includes 3D shape of a cube of the aperture. The plurality of indicium includes information regarding the classification of the 3D shape. The plurality of apertures is arranged in groups and subgroups of the groups based on a type of projection of the 3D shape.

A combinational template and scale ruler to accurately draw three-dimensional (3D) drawing is disclosed. The scale ruler is a transparent plate, which includes a plurality of apertures disposed at a middle portion. Each aperture defines a substantially continuous linear aperture corresponding to a visible edge of 3D shape. A plurality of indicium is juxtaposed around each aperture to facilitate drawing of the 3D shape. The plurality of indicium is inscribed in surface of the scale ruler. The plurality of indicium is graduated to define angle and size factor of the aperture to facilitate drawing of the 3D shape. The plurality of indicium further includes 3D shape of a cube of the aperture. The plurality of indicium includes information regarding the classification of the 3D shape. The plurality of apertures is arranged in groups and subgroups of the groups based on a type of projection of the 3D shape.

The present invention is etch a sketch tool that are used by sketchers for preparing various sketches and when one sketch is prepared sketcher/user can remove sketches without destructing etch a sketch tool which can then be re-used. Etch a sketch tool includes a lower enclosure, a glass resting frame, a hinge connection, a lower gasket, a glass, an upper gasket, an upper enclosure, a pair of knobs and a locking system. Upper enclosure is unlocked from lower enclosure. Upper enclosure is lifted, upper enclosure is spaced apart from lower enclosure and glass is removed therefrom. Glass is thus carefully removed from etch a sketch tool and a new glass can be replaced. Once new glass is replaced, upper enclosure can be locked with lower enclosure. Thus, etch a lock tool can be re-used again.

An archery bow measuring device preferably includes a support tube, an extension spring, a measuring tab, a length recording insert and a string nock. The support tube includes a measuring slot formed from one end to substantially a middle of the support tube. A plurality of measurement graduations are formed adjacent the measuring slot. The measuring tab and the length recording insert are slidably retained in the measuring slot. One end of the extension spring is retained in an opposing end of the support tube. An opposing end of the extension spring is attached to the measuring tab. The archery bow measuring device is placed on an arrow support rest of an archery bow and a bow string is inserted into the string nock. The user retracts the string to a maximum draw length. The measuring tab will push the length recording insert to a length along the measuring slot.