In the example shown on the graph, a line has been drawn from the 1/8 in. depth of cut point to the .015 ipr feed rate point. Another line has been drawn from the point of intersection on the vertical construction line to the amount of tool overhang. The second line drawn passes through the shank size scale at the ¾ -in (cross-sectional area) point. Tool holderts ½ x 1 in. or 5/8 x 1 in . would meet the requirements. Throwaway carbide inserts are also used for boring bars (Figure F-41) of various shapes and size. Brazed carbide tips are various shapes and sizes. Brazed carbide tips are sometime put on the end of a boring bar for special applications.