Round sub base can be used as a guide itself supplied with 10 mm guide bush 14in and 12in shank line up pin and bush and fixing screws will fit dewalt dw620 621 624 625ek 629 elu of97e mof131 177e bosch gof1600a 1700ace and makita rp0910 0111c and b q clm2050r 1250r 1103