This router is a complement to the 99-050. Please read my review of the 99-050 if you are having trouble understanding the use of these two attachments. I provide some useful links on how to create a sliding window using these or similar elements.
Multitool pliers GANZO G202 black
12 Review
Universal tool set 151 items 1/2" -1/4" BG151-1214
28 Review
High-Performance Whiteside Router Bits UD2102 Compression for Precise Woodworking
10 Review
Premium Tongue & Groove Milling π§ Cutting Tools by KOWOOD: Precision and Performance Unleashed
10 Review