drawing set, ruler, protractor, pencils, eraser and sharpener realistic wood and plastic on white background.

academic background black delta design drafting draftsmanship draughtsmanship drawing education educational element eraser ferula ferule gray green illustration instructional mechanical multicolored pencil pencils plastic practice products protractor realistic right rubber rule ruler sample sampler scale scholastic school set sharpener stationery straight straightedge template tool triangle trigon vector white wood wooden