Accommodates standard stamps with approximately 5/16" (8mm) square bodies. Eliminates the need to hold ring and stamp in one hand. Simply position ring over mar-proof plastic anvil (55.201-1) and tap stamp with mallet. Easy and accurate time-saver. Eliminates slipping of ring and it`s also ideal for flat stamping. The sleeve can be reversed or the stamp body can be touched up with a file if stamp is not 5/16" (8 mm) square. Stamps must be ordered separately.