This keyed locking device helps keep your firearms stored in a safe condition (though it does not relieve the owner or handler from the obligation of always paying strict attention to gun safety rules). This lock includes two keys and is all-metal construction with rubberized top, bottom and shackle coatings to protect firearms from scratching. The 2.5" x 50mm shackle fits many firearms including: GP100® & SP101® (.38, .357 & 10mm only) double action revolvers; single action revolvers including the New Model Super Blackhawk® and New Model Vaquero®; Red Label® shotguns; M77® Mark II and M77® Hawkeye Rifles; and Model 77/17®, 77/22® and 77/44® Rifles only. Refer to the instructions included with each lock for the correct process for securing each type of firearm (attached). Additionally, this lock has many other standard uses around the house, range, farm and truck for locking chains, buildings, gates, etc.