This set contains the 35-250 plastic molded mini miter box and 35-200 ultra thin kerf razor saw with 32 tpi (see 35-200 for complete description of this saw). It is used to cut square ends, perfect splices and mitered corners. The miter box has an adjustable stop and beveled channel for tubing and dowels. It is 6-1/2" long, with a 1/4" cutting depth and 1-1/2" cutting width. Has slots for making 30, 45 and 90 degree cuts.Zona's other ultra thin kerf saws–the 35-050, and 35-150, can also be teamed up with this miter box.