Forming Block - Cylinder, V-Shape, Rectangle - SFC Tools - 25-574 This forming block has cylinder, v-shape, and rectangle grooves, which can be used to shape metal accordingly. It has 10 cylinder grooves ranging from 2-25 mm; 7 v-shape grooves ranging from 2-8 mm; 5 rectangle grooves ranging from 2-7 mm. Weight: 2 lb 7 oz (1.1 kg). Overall measures 1.94 x 2.38 x 2.38 (4.9 x 6 x 6 cm).