For firearm assembly and disassembly, the Universal Bench Block is your best friend.
It features a variety of notches, grooves, and holes on both sides and is ideally suited for M1911-style pistols. Need to install a pin, detent, or spring The Universal Bench Block is the answer. 1-5/16″³ high, 4″³ in diameter.
Non-marring urethane for long use.