This adapter sleeve reduces the opening of the Rockler SL Router Lift to accept the smaller motor of the Makita RT0701CX7 compact router (#56434, sold separately) and the XTR01Z cordless compact router (#58142, sold separately). Made from durable polymer with an expansion gap for a secure fit. Compatible router motor is 2.73'' in diameter, or 8.58'' in circumference. ASIN B0BFXQCVNB Manufacturer Rockler Power Source Corded Electric Item Package Quantity 1