Tooth count, bit steel, bit length and case design decide whether a ratchet screwdriver set is worth stocking. Here is how to read a specification before you commit to a listing.
A 45-tooth ratchet needs an 8 degree swing to advance one tooth. A 72-tooth mechanism needs 5 degrees. In open work the difference does not matter. Between a bracket and a wall it decides whether the tool works at all. The 43pcs Ratchet Screwdriver Bit Set uses a 45-tooth mechanism rated at 15Nm, while the 25pcs Ratchet Screwdriver Set and the 6pcs Go Through Socket Kit use 72 teeth.
Chrome vanadium is the standard for hand-driven bits. A sandblasted finish holds a driver in the recess better than a bright plated finish, which matters most on Pozidriv and Torx heads where a slipped bit rounds the screw. Check that the specification names the steel rather than describing the bit as hardened.
A 25mm bit is the most widely available length, so the end user can replace a lost bit anywhere. Sets built around a non-standard length lock the customer into one supplier and generate complaints when a bit is lost.
A bit driver rated at 15Nm is not a substitute for a socket wrench. If the fasteners in your market are typically above that, list a socket set alongside the driver set rather than expecting one tool to cover both.
A moulded case that holds every bit in a named slot is what keeps a set complete after the first job. Sets that arrive in a loose pouch look cheaper on the shelf and generate returns when pieces go missing.
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