5/16"-24 Fine Thread Thumb Screw Bolt with Hard Rosette Plastic Knob for Clamping (Black) 18-8 Stainless Steel Pack of 4 Clamping Bolts Fine Thread 5/16-24 Thread Lengths: 1/2", 3/4", 1 in, 1.25", 1.5", 2 in Finger Grip Cap is approximately 1 1/2" wide x 3/8" Thick Use Drop Down Box for Length Fine Thread For Standard 5/16"-18 Thread Click Here Bolts are 18-8 Stainless Steel, with High Quality Knobs Made in USA If you prefer thumb screws made in different colors, ie; 2 Black, 2 Red, Please let us know Visit our store for additional thumb screw options Here Thumb screws offer a hand-adjustment feature, which allows for simple action to fasten, tighten, loosen, or remove the screws. However, they are also ideal for applications in which space is too restricted to allow enough clearance for the use of tools to fasten the screw. These can be used to secure material without using a wrench. They can also be used for: Panels Vices Clamps Router Table Camera Tripod Power Tools Woodworking Jigs Tile Saws Chop Saws Microphone Stands Visit our store for additional thumb screw options 100% Customer Satisfaction Rating Fast and Free Shipping Made in USA