I am an electrician. I will say this about all of WoodOwl's nail clippers. They are not priced the same. I've used several of them from 3/4 to 1 1/2. They make very smooth openings and easily cut through nails. You can tell you've hit one just by the clicking sound and the shiny, sheared metal in the hole when you're done. You can also sharpen them several times with a simple flat file. However, the more the tip of the self-tightening screw begins to move, the more force is required to drive it into the tree, the more it becomes damaged. I pierced the entire 2800 sqm. 12" 7/16 Shank Extension in Hole Hawg High Speed Tool. I went through 12 nails that I knew of. Through. I didn't start bouncing on the nail, I had to wriggle out and drill next to it. Right through. I had to only sharpen once towards the end because it slowed down a bit.----------------------- I have different sizes from 3/4" to 1 1/2". ", 7 1/2" and 18" long. Even at full price (prices fluctuate up and down so watch out for discounts), price and performance compared to Irw!n, I can only say one thing. Anyone want to buy my Irw!ns?-- -Woof