Base is 2” Square with a 1.5” Spring-loaded Tool Head---- Handles the Smallest most difficult Photo Etch of ANY scale with Speed & Ease ---- Ideal for 1:72 Aircraft scales---- Great for Small Detail Photo Etch for Ship builders---- A favorite of Z Scale Rail builders---- 6 sizes of finger widths---- Cut-Outs reach into parts for complex folds---- . Use all four sides of the tool-head never remove the Knob!---- Spring-loaded tool head easily rotated.---- Head & Base are machined from aircraft grade aluminum.---- Instructions and folding blade included.---- Lifetime guarantee against manufacturing defects.----