Quality Material: the plaster washers are made of steel, with zinc plated, sturdy and well made, can be applied for a long time Proper Size: the plaster repair washers measures approx. 1 inches in outer diameter, 0.177 inches in center hole, appropriate size for you to use Ample quantity: you will receive 200 pieces of plaster repair rings, sufficient quantities can meet your daily use needs, also can be kept as spare for accidental use Prcatical Function: the plaster buttons can be applied to fix the plaster against the lath, which can avoid sagging and cracking, maintaining your wall and ceiling in good condition Easy to Store: the metal washers for screws are in small size and lightweight, which can be easily stored in your tool cabinet, occupying a little space, convenient for you to take out as needed