A  Spiral Twisted Skewer  just push in the food and turn anti clockwise and the twisting screw motion  turns skewer inwards giving a tight grip. The overall length including a 28 mm eye is 150 mm  long approx  Manufactured from 3 mm,Non magnetic stainless steel wire food grade Ideal for  butchers meat /Smoke hut Smokers.- air fryers  with good point, can also be supplied with no point if required please ask.