The new Stringking Metal 2 defense shafts come in 3 weights specifically designed for age and ability based on strength. The High school and collegiate guys are going to want to go with the 350 and 380 gram shafts and it really all depends on the amount of abuse you are dishing out on a daily basis. We recommend the 350 for LSMs who play in transition. The 380 shaft is the best choice for defensemen who are looking to deliver punishment. The 320 weight shaft is for the advancing youth player, who is looking for a high quality, but light weight defensive shaft.