It's cheap but very useful; the set includes not only the screwdriver but also many different kinds of tiny screws. I fixed two pairs of my sunglasses (brand names) which fell down because of the loose bolts. To be honest, I didn't expect to fix them all given its cheap price and some very bad reviews (yeah I gambled; and I won!) I now regret going to the glasses stores to fix another pair of my sunglasses (paid nearly ten bucks and wasted an hour) before I knew about this product. I highly recommend this!