The head is black oxidized (precision surfaces are naturally ground) and the head has a lower profile than pictured. I believe this can vary from batch to batch. Head diameter 2.25", head height 0.75", nose length 0.68", nose diameter 0.9997". Runout <0.0001". I tried to measure the radial runout of the prisms, which turned out to be <0.0002". It's almost perfect. The threads at both ends are nice and smooth. Regular Β½-20 cap screw, no washer. 3/8" hex wrench included. More expensive than other imports, less than Shar's list price. I chose this one because I believe the Shars have a reputation for at least reasonable quality and this unit sets it apart from the rest away.
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