The smaller jig will make 105 different circle diameters ranging from 1" to 7-1/2" in 1/16" increments. The larger jig will make 256 different diameter circles ranging from 2-1/4" to 18-3/16" , also in 1/16" increments. Pivot points are pre-drilled , with the size clearly printed on the base. Made of heavy duty acrylic. Mounting screws and pivot pin included. USA
The base is compatible with the following router models:
Bosch - 1613, 1615, 1617, & 1450
Black & Decker - RP200 & SS1000RP
DeWalt - 615, 621 & 625, and 6182
Elu - 177
Fein - FT-1800
Hitachi - M8V, TR12, M12V. & KM12VC
Makita - 3612C, 3621, & RP1101
Freud - FT2000 & 2000E
Porter-Cable - 690 series, 894PK & 895PK, 7529, 8529, & 8902/8931
Ryobi - RE180PL & R175
Sears - 1617-12 and most Sears plunge models
Skill - 1823, 1825, 1835, 1840, & 1845-02.