Lacis - Slide-On Knitting/Crochet Gauge

The unique design takes the guesswork out of determining needle sizes. Quick and easy to use it is based on the go/no-go principle. If a Gauge notch "Slides-On" to a needle and the adjacent smaller notch doesn't. the size is determined by reading the size number on that notch. Crochet hook sizes can also be determined by checking the widest point of the hook. Made of a heavy gauge plastic.