This is a Brand New MTD 758-0437 Spindle Shaft. Silver Streak part # 85-015. Dimensions: Length: 4-1/2", Keyway: 3/16", OD: .787", Threads: 5/8-10. Replaces: MTD:753-0307, MTD:758-0437. This will be shipped Same Day or within 24hrs of purchase.