The larger sizes have a hex bolster so they can be turned with a spanner for extra torque. Contents: 8 x 100mm Hard grip screwdrivers - PH1, PZ1, SL4 (Parallel), T10, T15, T20, T25, T30. 3 x 125mm Hard grip screwdrivers - PH2, PZ2 SL5.5 (Parallel).
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