The Black Gold Movable Sights Dovetail Bar and Base is great for any bow hunter from a beginner to a professional archer. These Bars are great for keeping your sight further away from the naked eye, allowing you to be more accurate and precise with your shots. These dovetail bases can be put on any Black Gold bowsight and come in either 4 or 6-inch versions.Features:Universal BasesLightweightEasy Install Available in both 4a ^2 and 6a ^2 Lengths4DTSTD - 4-Inch Dovetail Bar and Base w/Standard Dovetail Jaw4DTAST - 4-Inch Dovetail Bar and Base w/Ascent mount4DTMCR - 4-Inch Dovetail Bar and Base w/Micro Adjust Dovetail Jaw6DTSTD - 6-Inch Dovetail Bar and Base w/Standard Dovetail Jaw6DTAST - 6-Inch Dovetail Bar and Base w/Ascent mount6DTMCR - 6-Inch Dovetail Bar and Base w/Micro Adjust Dovetail Jaw