This listing is for 1 packs of 10 NEEDLES ( 10 TOTAL) size #11-HAX1SP for the WHITE SPEEDYLOCK & SUPERLOCK OVERLOCK (Serger) Sewing Machine.
These Needles fit WHITE SERGER MODELS: 206, 208, 216, 228, 299D, 234DE, 503, 504, 523, 534, 534D, 634D, 734D, 734DW, 834DW, 1300DE, 1500, 1600, 1634D, 1700, 1800, 1900, 1934D, 2000ATS, 2500, 2900, 4500, 7234, 7340, 7934WD, 8234, S-34, S-34D, SL-34, SL-34D, SL234D, SL234DE, SL3400.
The SIZE of the Needles in this listing is: #11-HAX1SP (Metric Size 75)
This is a special version of the 15x1 for stretch or elastic materials and tightly woven knits. It is made to higher standards, it has the snake's head shape due to a combination of a slightly bulged eye and a slightly reduced blade above the eye. The bulged eye opens a slightly larger space in the material and the thinner blade above the eye reduces contact between the material and the needle . This reduces needle heat-up and prevents skip stitches.