The main advantage that the Organ 135x7SK1 has over the MR/SAN11 in Long Arm Quilting is that they make smaller needle holes, with cleaner stitches, and less chance of needle hole “overflow”. Organ brought the 135x17SK1 out as an improvement of the Singer 3355-01 MR needles and Groz Beckerts 135x17-SAN11 Groz Beckert has now replaced the 3355-01 MR with. We are selling more and more of the 135x17SK1 in all trades now. From Organ Needles

Can also replace with interchangeable needle systems: 1901 1955 SY1995 SY6790 34 134R 135X5 135x7 DPX5 DPx7 DPx134.

In-house comparisons reveal 30% reduction in the occurrence of skipped stitches.

Additional benefit over other crank-form needles is the reduction of sewing thread breakage.