Direct Replacement: Part numbers 313318001, 311759008, 311759013 compatibility with for for P2009, RY15523A, RY253SS, RY251PH, RY251CS, RY4CSS, RY25CSEMC, RY15523AVNM, and RY40006 Straight Shaft Trimmer models. Perfect for seamless replacements without performance loss. Versatile Compatibility: Not only designed for and for , but also fully compatible with popular like , -, , , Workforce, and . This universal fit extends the utility of your purchase across various equipment. Enhanced Trimming Efficiency: Engineered for optimal performance in lawn trimming tasks around trees, shrubs, edges, walls, and fences. The robust design of the s ensures reliability and precision, making it easier to maintain your yard's aesthetics. Construction: Crafted from materials, these s withstand regular use and tough vegetation. Their robust build guarantees long-lasting functionality, making them an excellent investment for both personal and professional landscaping needs. Color: As Shown Material: plastic Package Contents: 2 x 2 x Crank handle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.