The original interchangeable! Ideal for Tunisian or standard crochet and many knitting applications. Completely interchangeable with Denise knitting needles. Set includes 12 hooks sizes F5(3.75mm) to 19(15mm), 7 cords for Tunisian hooks from 8" to 21" plus 2 extenders and 4 end buttons. Compact case for easy organization. Made in the USA and guaranteed with normal stitching use. Unique locking connection - no tools needed!