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Interchangeable Heads


QH Ratchet Head

  • QH ratchet heads have a small tightening radius to facilitate effective tightening in cramped areas. The square drive QH10D-1/4, QH15D-3/8 and QH22D-1/2 models are one size smaller than the regular models, so their sockets are cheaper.
  • Ask for inventory status and price.
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Model Tohnichi Head Size Sq.Drive (mm) Sq.Drive (in) Outside Width (mm) h (mm) b (mm)
QH8D 8D 6.35 1/4 23 17.5 7.5
QH200I-2A* 10D 26 22 11
QH10D-1/4
QH10D 9.53 3/8
QH12D 12D 32 25.6
QH750I-3A* 15D 37.5 33.5 14
QH15D-3/8**
QH15D 12.7 1/2
QH19D 19D 40 38.4 15.4
QH22D-1/2 22D     21.5
QH22D 19.05 3/4 51 46.5
QH27D 27D 70 49.7
QH32D 32D 25.4 1 74 55.7 26.5

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