I've been using flat end tools for years and they have worked great. In this case the piercing part is hidden in the cap. It looks like this part can break easily. 3 cents worth of plastic for $5. If they were what is pictured in the order I would happily pay $5. To return.
Clear 100% Silicone Waterproof Caulk & Seal 2.8Oz Squeeze Tube (Pack Of 1)
31 Review
π Pecker Pack Caulk Saver Sealer
9 Review
π¦ Extreme Hold: Gorilla Strength Construction Adhesive Cartridge - Unleash the Power!
9 Review
π§ GE Silicone Kitchen Caulk GE5040: Premium Waterproof Sealant for Your Kitchen Projects
9 Review
π GTD Drip-Free Caulking Cartridge Tapes, Adhesives & Sealants for Newborn 930 Series
10 Review
π 10-Gallon Newborn 250 Revolving Cartridge
10 Review
π Cobiz Premium Sticks: The Perfect Holiday Decoration for a Festive Touch
9 Review
π§ Homax 5850 10 06 Perfect Caulk Finisher: Achieve Flawless Finishes Effortlessly!
9 Review