DeWalt DCF921N-XJ 18V XR Brushless 1/2in Hog Ring Compact Impact Wrench vs DeWalt DCF922N-XJ 18V XR Brushless 1/2in Detent Pin Compact Impact Wrench

Pros

• + Publishes both torque figures against the model code: up to 406Nm fastening and 610Nm breakaway, with 0 to 2,500rpm and 0 to 3,550ipm
• + Precision Wrench mode pauses at first impact going on and stops impacting when the fastener breaks free coming off, so a loose nut does not run off the stud
• + Scaffolding mode winds a nut down, impacts for a set period and cuts off instead of hammering until you let go
• + 125mm body and 1.1kg without a battery: it gets behind a wheel arch and inside an engine bay
• + Hog ring anvil swaps sockets one-handed, with a through-hole for an O-ring and retaining pin if you want more retention
• + Three-year DeWalt warranty once registered, and the widest professional battery platform on this list

Cons

• − Body only: no battery, no charger and no case, so it costs more than the sticker unless you already run 18V XR
• − 610Nm of breakaway is well under what the marketplace tools claim, and on a genuinely seized or over-torqued fastener that is the honest limit
• − DeWalt publishes no dust or water sealing rating and no LED run-on for this model
• − Vibration is declared at 13.0 m/s squared, the only vibration figure published for any tool on this page and a reminder that this is a hammering tool

Pros

• + Same published figures as the pick above: up to 406Nm fastening, 610Nm breakaway, 0 to 2,500rpm, 0 to 3,550ipm, 1.1kg bare in a 125mm body
• + Detent pin anvil holds the socket positively, which is the right choice on extensions and overhead work
• + Precision Wrench mode pauses at first impact and stops impacting on break-free, the same as the DCF921
• + Far more owner ratings on Amazon UK than the hog ring version
• + Three-year DeWalt warranty once registered, on the 18V XR platform

Cons

• − Detent pin is slower than a hog ring for repeated socket changes and needs sockets with a pin hole
• − The fourth mode is Timber Screw, a wood-screw setting, not a second fastener control mode
• − Body only: no battery, no charger, no case
• − The Amazon listing title is a poor translation that calls it an impact screwdriver, so search results mix it in with 1/4in hex drivers