I've used these to repair wooden furniture for over 5 years. They are easy to use, and no glue is necessary. The most difficult part has nothing to do with the product, but when repairing the rungs or backs and legs of chairs, you have to have every one aligned to push them or bang them together. I have found that using a rubber mallet is the best tool to use when doing this. If by chance it comes apart again, just use another piece perpendicular to the first, because the hole was too big to hold with just one. Again not the products fault. The repair was just let go for too long and the hole got larger as time went on. Excellent product, and highly recommended! I've bought many a chair falling apart and repaired them very quickly with this product.