Securely fasten -pieces of material (typically wood) at a 90-degree angle. Great for CNC and home projects. 1/4-20 Thread Size 20mm (~.787in) Length / 10mm (~.394in) Diameter / 10mm (~.394in) Centered Hole Plated Steel / Slotted Bulk package of (12) Note: Please do not order based on pictures only as it’s impossible to determine the hole size and threading, resulting in it not fitting; Please verify the exact hole/thread size by reviewing the target specifications and/or visit your local hardware to measure the hole/thread size BEFORE ordering; Please do not order multiple sizes on the hope of getting it right then what doesn’t fit as this is a poor and costly process. Note: Not with metric threaded IKEA/Other Furniture bolts