We designed the converter bolts to be the best on the market. They are 6mm long, so they work perfectly with any converter that doesn't have threads. Any of our Drop-Stop® screw-in converters with through-holes. Works with other brands of single converters. Weight: 4 bolts - 8 grams Material: 7075-T6 aluminum Size: M8 x.75 x 5 Torque spec: 7-8 NM tightening torque with light grease on threads only Made in the USA