Tool for cutting round holes in fiberglass

[seabob4]

I get the blades for my saw at HF also, I think around $6 for a pack of 5.  They are a VERY fine tooth design, when cutting through just glass, they last a LONG time, obviously, throw in some decent thickness wood coring...not so long.

But, considering the amount of holes I put in boat ( ), and considering the last pack of blades I picked up maybe 4 months ago, I'd say I'm doing pretty good.  And I still have 2 unused ones left...

BTW, with patience, those blades will even cut through a 1/2" SS bolt.  Ask me how I know... :x  :x

[seabob4]

Just an update on pricing.  Stopped in HF this morn (11" tie-wraps, $2.99 for the 100 pack!!), decided to pick up a package of my air saw blades.  They've gone up to $8 for a pack of 5.  They have them in 24 TPI and 32 TPI, I use the 32...