Trimmer head 2 With the Tap’n function, when the trimmer head hits the ground, more silk is released. Left hand thread, M10. Two threads for easy threading of the silk without opening the head. Made of high-quality polyamide PA6 polymer, with the addition of glass fiber (+30%) for greater impact and tear resistance and protection against cutting and piercing. Dimensions: 120x120x70mm, weight: 350g.