This is a nice little "starter" bracelet.  It fits every kind of bead you can imagine from the most expensive to the cheapest!  It's comfortable even when only a few beads are on it.  The extension I am still trying to figure out...how this works if indeed it is ever needed...the beads do not go over the two ends where the Lobster Claw clasps are so I can not see how it can be used...so I removed it from mine.  The only problem I am having with this reasonably priced little bracelet is the removable end of the lobster claw clasp...as it rolls around on your wrist  it comes loose and comes off if you don't notice this right away!  I had mine fall completely apart...thankfully I was at home and did not loose a single  bead  nor did any of them break when they fell to the floor!  Now I make sure it is tight "before" I put it on and I have also started putting a product on it called "Lock Tight" to make sure it does not loosen up while I have it on.  I change out my beads frequently and have had no problems what so ever getting the claw off once the Lock Tight is on it.  Just do not use very much of the product!!  I put just a tiny drop on the removable threaded side  after I have finished arranging the beads I want on it.  I let it dry for 24 hours and it is great!  You probably say to your self...well...I want to wear my bracelet right away...so I bought 2 of these bracelets so I can have one ready all the times while one is drying! I felt the price was right and buying an extra bracelet seemed like a good idea and it turned out to be that it was a great idea for me!!  The Lock Tight is not a problem...it has no smell and is not sticky or gummy or the least bit noticeable...you just need to be careful not to use much of it.  I have also purchased 150 of the Murano beads that  are available here on Amazon and they are wonderful...the only difference I have found is that they just do not have "name brands" stamped on the metal insert in the middle of the bead.  I have checked out all the name brands and these beads are "no different" than the "really expensive name brands" ...they just lack the name and the silver or gold insert.  My beads have worked great...they have not fallen apart or tarnished...but then when I am not wearing my bracelets I keep them in a zip lock plastic bag as you should all silver jewelry just in case they would tarnish and I have had my beads and bracelets for almost a year now with no problems with the exception of the threaded part of the lobster claw coming "un-screwed" at times.  I feel the "name brand" beads are just way to expensive and these inexpensive beads enable me to have a very wide variety of bracelets, necklaces and earrings.  I find that these beads will fit on any hoop earrings and chain necklaces.  Plus I have even checked out the bead section in the craft shops...you can find some great buys in identical beads that go on this bracelet!!  So if you go the "cheaper" route with these bracelets and beads you can literally have unlimited bracelets and other jewelry.