Overall the block is very serviceable, I only have 2 complaints: one pack contained strong preservatives requiring 2 cans of brake cleaner to remove, the second pack had threaded blocks, However, unthreaded holes are the same diameter as the threads. Using threads to connect blocks requires a threaded rod, which can make it difficult to connect blocks accurately. They are mainly used for woodworking, but this makes building them a bit more difficult.
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