The Kreg® Precision Router Fence (A) uses a t-square style design that allows for easy positioning of the fence. Unique cam-style locking handle and opposite-side anchor ensures incredible fence rigidity. Precision Lens Cursor lets you start getting real accuracy out of your router table. Fully enclosed 36-1/2” heavy-duty aluminum extrusion provides unmatched rigidity, and helps to maintain an enclosed vacuum chamber for dust collection. The precision router stop (B) has a unique design which allows the stop to flip out of the way when not in use. A precision cursor lens is built in to give you a clear, accurate view of your fences reading tape. The Kreg® precision router stop gives you unmatched repeatability for stop dado's, tenons and more.