As you can see in the photos, these are the finest blue aluminum hook parts around here. I would use them if I could. I can’t so I’m going to sell them to you. 44 mm X 42 mm X 6 mm Each one weighs about 2.4 g and the entire lot of 51 pieces weighs 2.6 lb. Each one is marked with part number 6344 revision a. The precision is very precise. If this is not enough, I have another bag just like it.