Grace Company Q'nique and Block RockiT Timing tool fits all models
Block RockiT and Q'nique Timing tool
Block RockiT and Q'nique Timing tool
This timing tool works on the Block RockiT 14+, 15R, 15 Pro, 19, 21R, and Pro 21. It also works on the Q'nique 14+, 15R, 15 Pro, 19, 21R, and Pro 21.
Before adjusting the timing verify that the timing is really the issue. Most of the time there are other issues that might cause your machine to skip stitches.