From denise interchangeables comes love2crochet - the interchangeable crochet hook set ideal for tunisian or standard crochet. Connect crochet hook heads to flexible cords with the unique denise locking mechanism, and you're ready for tunisian crochet projects with yarn from lace to worsted weights. Or use the hooks for standard crochet. These tidy and petite sets come in two size ranges: us f5-j10 (3.75-6mm) and us k10.5-19 (6.5-15mm). Each set is packaged in a simple but durable vinyl case with dividers in the front for each hook size and a pocket on the back to hold cords and accessories. Included in this set are: - 6 interchangeable crochet hook heads in sizes usf5-j10 (3.75-6mm)- 4 cords: 3", 5", 9" and 14" (7.5 to 35cm) for tunisian hooks from 8 to 19 (20 to 48cm) or up to 28 (71cm) with cords joined together - 60 possible combinations.- 2 end buttons, and 1 extender for cord-to-cord connections. Love2crochet sets are interchangeable with all denise products. Love2crochet is great as a stand-alone set or can be the perfect add-on for a standard denise interchangeable crochet hook kit. Have extras of the hook sizes you use most, or try your hand at double-ended tunisian crochet for a whole new world of color opportunities. Case dimensions for usf5-j10: 5" x 8.5" x .5". Plastic resin hooks are 4 5/8 long. Cords are made with a non-phlatate plasticizer, safe for use with children.