Durable plastic needle gauge for sizes US 000-15 (1.5-10mm) knitting needles, with a 2" gauge ruler.
While US/mm sizes correlate to Addi brand needles, this compact little gauge is useful for any needle brand.
Have you wondered about the purpose of little slot on the back? In Europe these are sold with a sliding razor for cutting ends. Because of liability these are not included in the US market.
