POWERFUL: Used to convert string trimmers to a powerful cultivator for mulch beds, seeding, etc. ADJUSTABLE: Adjustable 7 in. to 10 in. steel tines for strong performance and extended durability. EXTENDED LIFE: Durable gearbox for a long life and user convenience EASY MAINTENANCE: Tines can be changed easily and quickly without tools to tackle your projects efficiently. COMPATIBLE WITH MAJOR BRANDS: ATTACHMENT CAPABLE TRIMMERS ENHANCED SAFETY:Large safety guard shields you from flying dirt and debris.