Compatible with Models: Bad Boy MZ42. Compatible with: MZ Magnum 48, MZ Magnum 54. Spindle Specs: Height 5 5/8. Improve Cutting Capability & Consistency. Compatible with the following brands: Bad Boy. Compatible with the following models: MZ42, MZ Magnum 48, MZ Magnum 54. (As shown in the picture). If you are satisfied with our products and services, hope to take up your little precious time to leave feedback reviews for our products. Your satisfaction is our effort. Welcome to order again! Have a great day!