This set of pins include: 28 pieces of 3/32" x 3", 13 pieces of 5/32" x 3-1/4", and 9 pieces of 3/16" x 4". Double R-pins are know for their shape similar to the letter R. These have an extra loop for more support. These pins can be used in many applications. One specific use would be to secure the end of a hitch pin or shaft. PLEASE NOTE: this product is only available at our Texas locations. | Spring Creek Products 50-Piece Assorted Double R Pins