DESTORNILLADORES DE FORJA: EL PERFECT HANDLE ESPAÑOL (Perfect handle screw drivers).

Four one-piece forged screwdrivers, what the English call "perfect handles." They don't have a specific name in Spanish. I restore them, fit them with new horn handles, and take the opportunity to talk about their history, their mechanics, and the Basque brands that manufactured them: Palmera (founded by a German), Acesa, and Irimo, all now part of the Swedish Bahco group. 0:00 Presentation of the perfect handle screwdrivers 0:27 Forged construction and the 1902 American patent 0:55 Condition of the pieces. Measurements 1:18 The full tang: tightening torque and comparison with plastic handles 1:54 The European square drive: using with an adjustable wrench 2:31 Why they were used as chisels: consequences for the wooden handles 3:10 The screwdriver I've already filed and polished 3:27 Decision: horn handles instead of mahogany 3:46 Current state of the work: fitting, pins, rivets 4:44 The design flaw: blade axis and handle opening 5:06 Hand Tool Rescue and My Mechanics: level reference 5:51 Explanation of the flaw: lever, axis, and handle strength 7:14 Vintage screwdrivers with wooden handles and metal ferrules 8:42 Spanish brands of the perfect handle: Palmera, Acesa, Irimo