Spring Steel Axle Set. Requires drilling hole in your main gear to 1/4". Includes 2 axles, 2 nylock nuts. 3/8" wrench to hold axle, 7/16 wrench to run in securing nut. Threaded portion is .325 long. This axle kit contains 2 axles just like the left most axle in sample photo. SKU Number: DUB246