JC753 CULPITT: TOOL-JEM-MODELLING-No.3-BONE TOOL - PACK OF 1 Jem No.3 Bone Modelling Tool £2.17 Quantity: at £2.17 each Add To Basket 140mm. (Boxed 1). 3A - A very useful tool to smooth petals on a JEM petal pad, or to encourage petals to curl. Use as a ball tool. 3B - Same as 3A except with a slightly smaller head.