The product(s) I needed were not readily available through local window & door suppliers. In addition, the number of options & variations of the locking system made it difficult for me to make sure I was ordering the proper parts without assistance. I used the "on line" customer assistance & received help in measuring my door & damaged parts correctly. This service insured ordering the proper combination of replacement parts. The parts I ordered are from original manufacturer & not cheep replacements made off shore. They were in stock & shipping was fast & packed well to insure my order arrived without damage. I recommend this company without reservation.