To create consistently sized loops time after time. Constructed from stainless steel and fitted with PVC handles. Available in 2 sizes: the small mandrel has 5 diameters (1.5, 2.5, 3.5, 4.5, and 5 mm), and the large mandrel has 5 more (6, 7, 8, 9, and 10 mm) for larger loops and circles. Both are machined and polished to prevent scratching. 6" long overall.