Our UL-TC-3 has a .367" x .100" slot for a regular large key. File the slot larger, if necessary. Formed steel, the flat base is about .590" wide, by .722" long, with a large surface for a good solder joint, if you wish to avoid a slot in thin walled barrels.
TOOL-DOVETAIL
Dovetail Forming Chisel
wax cast steel, made in the USA
TOOL-KEY-B
Drift Punch,
knurled brass,
for wedge keys and sights.
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