These Two-Hole diamond shaped beads are part of the Czechmates 2 Hole 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 CzechMates Diamonds are made in the Czech Republic from pressed glass and have a very uniform size and shape. The corners on these uniform seed beads are softly rounded and will not cut into your skin or thread.