Helps you cut flawless circles * Fully adjustable, slide the center pivot pin up or down the length of the jig to rout circles from 10-Inch to 52-Inch in diameter * Includes two center pivot pins for different routing applications ole) * Includes a T-bolt with 4-star tightening knob to tighten the center pivot pin to the jig for worry-free, no-slide routing * Fits PC100, 690, 890, 893, 7529, 8529 Series, Makita 1100 Series, Hitachi M12VC, DeWalt DW625, DW616, DW18 Series, Bosch 1617, 1618, 1619, and 1919EVS