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What are the most common applications for the marking feature?

Marking pipe and conduit, arch cuts in plywood, or electrical outlet and HVAC cutouts.

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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

Are Irwin cobalt drill bits coated like the titanium ones? If the cobalt bits are rockwell hardness 66 - 67 HRc, what hardness are the titanium bits? Once you sharpen a cobalt bit and the gold coating is gone, is it just a regular bit?
How do I resharpen Irwin auger bits?
How do I resharpen Speedbor flat bits?
What is the recommended bit speed for flat bits? I am sure that the speed varies by bit diameter and wood species
What is the function of the hole in an auger bit?
Does the spade bit #88810 fit in the regular bit extensions #88702 that are not Quick-Change.
I recently purchased an old 13 piece set of IRWIN Solid Centre Stem Auger Bits from a used tools store for use in a hand-brace. The bits came in a wooden box with a swing-out lower drawer, and a black descriptive label on the inside lid. The box label says "1 set 20 1-2 quarters". What do these numbers mean? The bit numbers are 4, 5, 6, 7, 8, 10, 12, 14, and 16.
How do you sharpen your 1"speedbor ship auger bit ?

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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