gold tool steel grooving block a versatile block made of fine, hardened steel. 
for bending and shaping creative forms on small lengths or sheet, wire, tubes and rods. rectangle, half-round and v-shaped grooves and a number of flat surfaces make this a very handy tool on the jewelers work bench. the v-grove not only is great for bending wire and sheet in unique ways, but it also allows you to hammer on the tubing without smashing it. gently rotate your tube while hammering to make sure you form it evenly. this block also makes holding tubing during cutting very easy.