1/4"-20 Thumb Screw Bolts with Round Gray Hard Plastic Hand Grip for Clamping Pack of 4 Thumb Screws Stainless Steel 18-8 1/4-20 Standard Coarse Thread (knob does not affect length) Sizes Available: 1/4 x 1/2, 1/4 x 3/4, 1/4 x 1 in, 1/4 x 1.25, 1/4 x 1.5, 1/4 x 2 in, 1/4 x 2.5 1 1/2" and Longer are Partial Thread Plastic Clamping Knob Details: Plastic Knob Grip Dimensions: 1 1/2" Wide 7/16" Thick Finger Grip does not interfere with length of Bolt These Thumb Screw Clamping Bolts have a round, fluted knob that is pressed on. It's designed for comfort and efficiency when removing or installing by hand. It is molded in California out of a hard delrin plastic material, that is heavy duty, with a glossy finish. Stainless Steel 18-8 Socket Cap Screws 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 Thumb screws offer a hand-adjustment feature,which allows for simple action to fasten, tighten, loosen, or remove thescrews. However, they are also ideal for applications in which space is toorestricted to allow enough clearance for the use of tools to fasten the screw. Designers might choosethumbscrews for household, electronic and other consumer products, not just forthe ease of fastening but also to avoid the risk of over-tightening. They areparticularly beneficial for assemblies that require repeated removal andreinstallation. When used forremoval-and-reinstallation applications, such as safety covers or accesspanels, these bolts can reduce the amount of time required for maintenance orinspection. Their hand-adjustment design also reduces the incidence of brokenor stripped fasteners that might occur with frequent removal andreinstallation. Visit our store for additional thumb screw options 100% Customer Satisfaction Rating Fast and Free Shipping Made in USA