Effetto Mariposa's GF PRO (Giustaforza - Bicycle Torque Wrench) was reviewed in WIRED Magazine's Blog, by Mark McClusky. WIRED Magazine is one of my favorites so it was really great to have the Giustaforza featured.
Mark covers all the bases with this review, including the 1/4" (quarter-inch) bit receptacle. It is good to mention that the Giustaforza takes the standard 1/4" bit size, as you can find these bits in all your local hardware stores, it also means you can use a 1/4" socket adapter and use the wrench to tighten nuts to spec on bolts.

The Effetto Maripos 1/4" bits are made from S2 special steel and have a very high (62 Hrc) surface hardness. This makes them long lasting.
Over all Mark loved the Giustaforza and has now made the wrench a permanent home in his tool box.
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