
First of all I've always been a fan of Sunex tools, good quality from a Taiwanese manufacturer. So, in case you're wondering, the country of origin is Taiwan. Model 9921 is the metric version of the "long" hex bit set, #9920 is the SAE FYI version. The quality is good, only used once so far. There are a few cons for me, hence 4 stars. They're only 4.5" OAL, including the socket and hex. Typically a long hex bit is a 6" hex plus a socket. Let's see how it works for me over time. The second downside is, that both kits come with a red storage bar so there is no quick ID between metric and SAE, small I know but time is money in business Overall I am very satisfied as I have both a straight and hex screwdriver could get in a set.

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