Amazon.com: addi Flexi Flip Bamboo Knitting Needles (Set of 3) - US 0 (2.0mm)
Addi FlexiFlips Squared Needles Reviews at Jimmy Beans Wool
Flexiflips might be worth the hype…the tension difference between magic loop (bottom) and flexi flip needles (top) was immediately apparent on this sock ! : r/knitting
Knitting in the Round, Choosing Needles, Size Issues – New England's Narrow Road
ADDI Flexi Flips Bamboo Double Point FLEX Knitting Needles at Fabulous Yarn