T-SPIN Bamboo Tunisian interchangeable set comes with the following: 11 5.7″(14.5cm) hooks in sizes E/4 (3.5mm) N/15 (10mm), including size 7 (4.5mm); 4 TWIST[S] red cables (two 8″/20cm, one 14″/35cm and one 22″/55cm); 4 end stoppers, 4 adapters, 2 connectors, tightening keys and a needle gauge; zippered case very similar in design to the current interchangeable cases. The hooks are made of Moso bamboo, have a pointy head to get into your stitches and a stainless steel join. The size is permanently laser marked on each hook. Size I (5.5 mm) and larger hooks will fit the [S] cables with the use of an adapter (included). Compatible with SPINcables.