1)Please give us a feedback if you felt not pleased with quality or service. 

2)We guarantee most of the accessories,like screws, "L" screwdriver,base pads. 

3) Shipping cost is too expensive for us to accept returning defective products. Once customers find it is a defective product when opening the box,do send us emails including pictures,then we can study it and will send replacements at our cost to repair the the product if necessary,or compensate a new one in the following new order. 

Please don't hesitate to contact us for our full line price lists.