I use this in my tutorials!

Artistic Wire Wooden Mandrel Set Jewelry Making Kit - 6 Sizes from 1/4"-1" Dowels in Convenient Storage Case, Bracelet Jig, Ring Making & Wire Wrapping

Name: Wooden Mandrel Set, Artistic Wire Brand, beechwood, Mandrel Set, 6
SKU: 263111

USE: Smooth, shape and condense knitted, crocheted, Wire weaving or braided wire Features 22 holes for maximum flexibility in forming chain in any desired length.
SIZE: 22 Holes total. One side marked with millimeters: from 16mm to 3mm. Other size measures in inches from 5/8" to 1/8". Essential wire shaping tools for wire weaving and viking knit tool.
JEWELRY MAKING TOOLS: Designed to work-harden, smooth and condense knitted, crocheted, woven or braided wire without scratching or marring your wire. Perfect for viking knit designs and wire rope.
Smooth Edge Finish - The smooth edges on this dowel plate help prevent snags when knitting or crocheting jewellery pieces and provide professional looking weaves and twist finishes.
Start with a length of knitted or braided Wire rope, then draw it through successively smaller holes until it is the size you need. Each hole is slightly tapered to make a smoother draw.