Increase the size of your firearm's hammer spur for easier use with the Universal Hammer Spur Extension from Carlson's. Featuring knurled ends for a positive grip, this ambidextrous extension installs easily by simply sliding the extension over the hammer and tightening the set screw with the included hex wrench. Durable hard anodized aluminum extension features a 1/2 wide by .2 deep opening. Measures .375 thick by 1-1/2 long. Fits most exposed hammer firearms. Can be used with or without telescopic sights. Color: Black. Manufacturer style #: 00110. Increases size of hammer for easier grip and use Knurled ends for positive grip Ambidextrous Simply slides over hammer and locks down with built-in set screw Durable hard anodized aluminum construction Can be used with or without telescopic sights