Where DO screws come from?
19:54
The HIDDEN Screws of PRECISION
52:14
Old Style Vice - Extremely Rare to Find so I Made One
17:58
The Incredible Strength of Bolted Joints
26:49
The most important screws EVER MADE!
9:46
How America RUINED the world's screws! (Robertson vs. Phillips)
16:25
Robertson, Phillips, and the History of the Screwdriver
24:04
The Science Of Cutting
18:43