Toothed Tracing Wheel by Prym
This toothed tracing wheel from the Prym Ergonomics series allows you to transfer marks from patterns onto paper or fabric. The spiked wheel draws a dotted line through paper, leaving a dotted indent on anything underneath. For that reason you should always use it on top of a cutting mat or risk damaging your work surfaces!
Useful for tracing patterns or blocks as well as the positions of pockets, darts and tucks. You can use this was carbon paper to leave a coloured line on your fabric or paper.