This little gadget allows you to draw your wire down to a smaller diameter. Perfect for wire knitting, crocheting, and much more! The results are beautifully smooth and round chain lengths. By drawing the wire chain down in diameter it also lengthens the chain and work-harden the wire. For use with Gold, Silver and Artistic Permanent Coloured Copper Wire. 12 holes range in diameter from approximately 1mm - 7mm