Dewalt DCS393 6 1/2 Cordless Circular Saw Type 1 20v 

edge guide 381091-00

will fit models:

DW936 Type 1 Cordless Trim Saw
DW936 Type 1 Cordless Trim Saw
DW939 Type 1 18V 6-1/2 Cordless Circular Saw
DW939 Type 1 18V 6-1/2 Cordless Circular Saw
DC390K Type 1 Cordless Circular Saw
DC390K Type 1 Cordless Circular Saw
DW936 Type 2 Cordless Saw
DC300 Type 1 Cordless Circular Saw
DC300 Type 1 Cordless Circular Saw
DC310 28V Circular Saw
DC310 28V Circular Saw
DCS393 Type 1 20V Circular Saw
DCS393 Type 1 20V Circular Saw
DCS391B Type 1 20V Circular Saw
DCS391B Type 1 20V Circular Saw
DC390B Type 1 18V Circular Saw
DC390B Type 1 18V Circular Saw
DCS392 18V Cordless Circular Saw
DCS392 18V Cordless Circular Saw

DC300K (Type 1) 36V Cordless Circular Saw
DC310K (Type 1) 28v Circ Saw
DCS391M1 (Type 1) 20v Circular Saw
DCS391P1 (Type 3) 20v Max 6-1/2in Circular
DCX5200 (Type 1) 28v Hammerdrl/Circ Saw
DW939K (Type 1) 18v 6-1/2 Circular Saw
DW936K (Type 1) 18v Cordless.Saw
DW936K (Type 2) 18v Cordless.Saw
DC390B (Type 2) Circular Saw Power Tool
DC390K (Type 2) Circular Saw Power Tool
DCS391B-B3 (Type 1) Circ Saw Power Tool
DCS391B-B3 (Type 2) Circ Saw Power Tool
DCS391B (Type 2) 20v Circular Saw Power Tool
DCS391B (Type 3) 20v Circular Saw Power Tool
DCS392 (Type 1) Random Orbit Sander Power Tool
DCS392 (Type 2) Random Orbit Sander Power Tool
DCS393 (Type 2) 20v Circular Saw Power Tool
DCS393 (Type 3) 20v Circular Saw Power Tool
DCS393 (Type 5) 20v Circular Saw Power Tool