Set of two specially made black wedges for Extra big tennis rackets and Narrow throats squash rackets, one piece of 47 mm and the second piece of 33 mm. They fit on top of the stringing machine centre supports at 6 o'clock and 12 o'clock positions. Can be used for stringing very big tennis rackets up to 43.50 cm centre distance from head to throat, when using both adapters. Suitable for Wilson Baiardo and many other brands stringing machines.