♥Specification Name: Retaining Pins R Clips Material: Stainless Steel spring Weight: 526 g ♥ How to use After tightening the nut, insert the cotter pins into the groove of the nut and the hole. the extremity of the bolt - pull the tail of the cotter pin to prevent the nut and bolt from rotating relative to each other. the other. ♥Package Contents 42 x 3/32" x 1-3/16" Cotter Pins 30 x5/64" x 1-5/16" Cotter Pins 25 x 5/64"x1-9/16" Cotter Pins 25 x 7/64"x1- 5/8" cotter pins 20 x 9/64"x1- 3/4" cotter pins 8 x 5/32"x2 - 15/16" cotter pins