Does the Marble Arms dovetail blank slide in from right to left, or left

Does the Marble Arms dovetail blank slide in from right to left, or left dovetail slot blank How to Mount a Receiver Peep Sight and Rear Slot Blank ~ 336 Marlin Deluxe Upgrade dovetail slot blank Dovetail Collet D74*40 mm,with Dovetail Width 25 mm is useful for Copper, Aluminum and Other Metal Cutting Processing because of its Blank Positioning, Small

dovetail slot blank For this project we ordered the following items from Brownells: Sight dovetail slot blank · Hi-Force 44 Solder · No 4 Comet Flux · Heat Stop

slot machine disegno those dovetail jigs for cutting or filing the 38 dovetail slots for the under lug or the front site slot how good do they work with a file that they  Ruger 1022 - Sight Removal Tool & Dovetail Blank