APX Axle Peg 5/32" dia. tenon x 5/8" tenon length. Wood axle peg for wheels with 3/16" hole. Axle peg length shown is the tenon length. The peg is snug in 5/32" hole. Typically you make the hole in toy body 5/32" and your wheel has 3/16" hole, allowing the axle to attach to toy and the wheel to spin freely.The only wheel that uses this axle is the WX34X.