STEELMAN PRO 78151 1/4-Inch Drive Extension Tool, 10-Inches Long 10-inch extension bar to easily reach into narrow spaces Constructed of drop-forged carbon steel High-polish chrome-plated finish helps prevent corrosion Spring-loaded ball bearing locks onto sockets Knurled shaft allows for easy hand-starting and tightening of fasteners to prevent cross-threading Compatible with all 1/4-inch drive ratchets and sockets Lifetime guarantee