These CzechMates QuadraTile four-hole beads are part of the CzechMates beading system, with the holes perfectly aligning with those of the other two-hole beads manufactured by Starman (including the two-hole tile beads). The bead holes are large and allow for multiple passes of beading threads. These beads are made in the Czech Republic from pressed glass and have a very uniform size and shape. The corners are softly rounded and will not cut into your skin or thread.