Brownells Smith & Wesson Sight Nut Spanner

MAGNA-TIP(R) Bit, made to fit the windage nut that secures the S&W rear sight leaf. To use: Drill out staking, hold nut with Spanner and unscrew the screw. To install: Hold new nut with Spanner and seat screw. Always turn the screw; never the nut. Because it is fragile, and can break if you turn it, the Spanner is not guaranteed against breakage. Mfg: Brownells SPECS: 1 1/2" (3.8cm) long. .154" (3.9mm) diameter.