The Durable Ratchet Gear Heads are Nade of Hardened Heat-Treated Chromium Vanadium Alloy Steel (Cr-V). Non-Slip Knurled Handle. 1/4" - Torque range:20-200 in.-lb. | 2.26 ~ 22.6 N-m. 3/8" - Torque range: 10-80 FT-LB / 13.6~108.5 N-M.
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