• [Impact-Resistant Material] Made from high-quality ABS plastic, offering excellent resistance to impact and wear • [Enhanced Durability] Built for long-lasting performance, ensuring reliable use over time • [Easy Installation] Simple and quick to install, saving time and effort for users • [Smooth Operation] Designed to maintain smooth and efficient operation for your lawn trimmer • [Break-Resistant Design] Engineered to reduce the risk of cracks or damage during heavy use Specifications: • Material: ABS • Size: 43*17mm • Replaces part numbers: 791-153066 and 791-153066B • Compatible with MTD models: 41CDZ01C735, 41AD110G883, 41DD160G983, 41AJCS-C902, 41AJBT-C954, 41EDZ03C758, 41BDC25C010, 41AD26OG701, 41CD425C995, 41CDY15G901, 41BDY40G901, 41ADY71C901, 41ADC25C010, 41CD700G977, MT765, 41CD765G977, 41AD180G983, 41AD452C755, MT700, 41ADZ01C758, 41AD700G929, 41ADY21C901, 41AD457C755, 41AD465C910, 41BDY20C901, 41BD700G977, 41CDY70C901, 41AD575C910, 41BDZ25C766, 41ADC46G912, 41ADC05G912, 41ADC20C912, 41BD7VPG900, 41CDZ11G799, 41DDZ12G799, 41BD765G900, 41DDZ03C758 and more • Compatible with Craftsman Trimmer models: 31674556, 31679111, 31679112, 315742260, 316711370, 316711470, 316711471, 316791020, 316791080, 316791081, 316791190, 316791191, 316794400, 316795030, 316796150, 316798221, 316990100, 316990110, 16.792520 (41AJCS-C799), 16.794400 (41ADZ21C799), 316.711370 (41ADZ11G799), 316.745400 (41ACETBC799), 316.79119 (41AD780C799) • Compatible with Troy-Bilt string trimmer models: BR720, TB10CS, TB15CS, TB20CS, TB20DC, TB21EC, TB22EC, TB26TB, TB32EC, TB415CS, TB475SS, TB50, TB65SS, TB70SS, TB75SS, TB80EC, TB22, TB2EC and more Package included: • 4 x Bump Knob Assembly • Other items not included