We use these CNC bits to chop and route out the plastic for our folding kayaks. We do all producing in-residence. So, it is excellent to possess a constant supplier of excellent bits, with a 2 working day turnaround on orders. They are ALL good chargers which just take readings https://www.hukums.com/products/stanley-70-366e-double-ended-open-jaw-crv-spanner-6x7mm-pack-of-10pcs