Made of high quality material with plastic and metal which is durable and long life. Suitable for and many other lawn machine/lawn mower. A plastic nut and a bolt. Easy to use and install. Size: screw:50mm(L),20mm(head dia.),8mm(dia.). Package includes : 1X handle bar wheel knob and bolt for lawn mower for Many Lawnmower. Please contact us freely if there??s any question.Features: Suitable for and many other lawn machine/lawn mower. High quality material. A plastic nut and a bolt. Easy to use. Specification: Size: screw:50mm(L),20mm(head dia.),8mm(dia.) Material:plastic and metal Package includes: 1X HANDLE BAR WHEEL KNOB AND BOLT FOR LAWN MOWER For Many Lawnmowers