Safety & Skill
Seasoned pros wear safety glasses or goggles. You should as well.
Wear a dust mask or respirator during all drilling and cutting procedures.
Keep a controlled grip and make sure the drill is square to the surface.
Use a centerpunch to dimple the surface so the bit won’t skip.
A pair of light gloves prevents abrasion from splinters and chips.
Don’t push down hard. Instead, let the saw do the cutting for you.
Keeping the tool square and level is important when using a hole saw.
For deep cuts, work in stages, stopping the hole saw and clearing it.
Drill holes through the “corners” to insert the blade and avoid overcutting.
After the holes are drilled; connect the dots, cutting along the marked line.
Bevel or chamfer the edges of holes with a countersink, or even a file, for the very best seal.
Make sure you seal both sides of through-hull fittings, applying even, generous sealant beads.
Avoid paper towels. use a scrap of foam rubber and soapy water to clean up excess sealant around the fitting.