The Carlson's Hammer Extension for Henry Rifles provides an easy cocking option for left or right handed shooters at all times. Balanced and lightweight, this extension helps prevent uneven wear of trigger and sear surfaces. The knurled body affords positive non-slip cocking. FeaturesKnurled, non-slip designAmbidextrous styleOptions for rimfire or centerfire Henry Rifles Note: 730919 is for all Henry Centerfire Rifles, including the H006 series Big Boy with post-2010 hammer style. Big Boys with the old (pre-2010) hammer style will not accept this hammer extension.