18-8 Stainless Steel Thumb Screws – highly resistant to corrosion and rust, making them ideal for both indoor and outdoor use, even in harsh environments or areas exposed to moisture. Durable and long-lasting for secure fastening. Acetyl Thermoplastic Thumb Screw Heads – hard, durable, and resistant to wear, chemicals, and moisture, offering a lightweight, non-conductive solution with easy, fast adjustments for a wide range of applications. Clamping Knob Grip Dimensions. Width: 1 1/2" Thickness: 1/2" Has an ergonomic sturdy grip for fast adjustment without a wrench Versatile Thumb Screw Design – suitable for a wide range of applications, including machinery assembly, panel fastening, and DIY projects, ensuring easy installation and removal with just a simple twist. Made in USA by a Family Owned Small Business. 1/4"-28 Thumb Screw Bolts (Fine Thread) with Round Plastic Cap for Clamping Pack of 4 (Fine Thread) Product Type: Thumb Screw Bolts Material: Stainless Steel 18-8 Pack Size: 4 Screws per Pack Thread Size: 1/4"-28 (Fine Thread) Available Lengths: 1/2", 1", 1-1/2", 2", 2-1/2" Cap: Round Plastic Cap for Easy Manual Tightening Features: Tool-Free Use: Easily secure materials without the need for a wrench. Versatility: Ideal for use in panels, vices, clamps, router tables, camera tripods, power tools, and woodworking jigs. Durability: Made from high- stainless steel for enhanced strength and corrosion resistance. Ease of Use: Plastic cap allows for easy adjustment and tightening by hand."