Every so often questions come up about the Craftsman Bis-Kit. This is an attachment designed to fasten to the bottom of a Craftsman router which cuts slots for #0, #10 and #20 biscuits. The Bis-Kit sold for about $40 and I had one of these back when I used Craftsman routers. These units were discontinued a couple years ago and I snagged a couple for $15 each. They are not fancy but they work fine for cutting slots to edge join boards, mitered corners and 90° corners. The Craftsman slot cutting bit included in the kit has an OD of 2" with a tooth width of 5/32". If you need a replacement MLCS has a 1-15/16" slot cutter which should work fine. By plunging and releasing the tool you should be able to make quality #11 round biscuit slots. You can download the owners manual from our router reference section.