When your socket walks off a brake caliper bolt or a transmission bolt in the first second of impact, you burn time re-seating it — or worse, you round the fastener. This 1/2-inch drive impact extension has a magnetic socket retainer that holds the socket locked on through every hammer strike, so you drive, not chase. The 3-inch length gets you past exhaust manifolds and into transmission bolt territory without the flex and walking that a bare extension gives you in an deep recess. Chrome vanadium steel handles sustained impact torque without deforming — this isn't mild steel that springs after a season of use. Standard in mechanic tool sets across northeast Nebraska and northwest Iowa — the extension that doesn't walk when you need it most. In stock at Crofton Lumber (Crofton, NE) and Akr Stocked at Crofton Lumber and Akron Lumber.