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What is the Diamond symbol every 19'-2" increment?

The diamond symbol represents an alternative on-center spacing for framing materials. The spacing matches 16" on-center spacing every 8' making it compatible with most sheet goods (plywood, OSB, and paneling). The benefit of using the diamond symbol is that you save one joist or stud every 8'.

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Chisels

Can IRWIN chisels be re-sharpened? If so, what's the best angle to re-sharpen at?

Circular Saw Blades

I am crosscutting oak veneer plywood on a table saw, and the veneer is chipping on the backside. What type of blade would you recommend to cleanly cut across plywood?

Drill Bits

Extractors

What is the difference between a nutsetter that has a standard hex design vs. one that has a lobular design?

Fastener Drives

I recently purchased a cargo trailer. There are 2 screws that hold the license plate bracket on. I cannot identify the screw drive type. At first glance I thought it was a Torx head, but upon closer examination and trial I noticed that the star has 8 points instead of 6. The points are not as prominent as a Torx. Can you identify it?

Hand Saws

Levels

Marking Chalk

Pliers and Wrenches

Are the GrooveLock and ProTouch pliers tested?

Snips

Tape Measures

Taps, Dies, & Sets

Utility Knives & Blades

What does the 'Bi-Metal' mean when referring to a utility blade?

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