The design uses three fingers that grab the apple. The fingers have small elastic bands to make them return to their upward position. The pivots are 5mm diameter Stainless Steel dowels 30mm long that can be found on eBay There are three different lengths of fingers so you can choose the most appropriate for the size of apples you want to pick. The hole for the handle suits a large diameter, but these vary a lot. I've included the design files in case you wan't to change that. There are holes around the bottom for small cable ties to attach a 250mm long sock made from Cargo netting to catch the apples.