The Brunner & Lay Rock Drill Bit Jackhammer is a high-quality tool designed for demolition and drilling tasks. With a 15" length and 1" inner diameter, this jackhammer bit is durable and reliable for various industrial applications. The Brunner & Lay brand ensures a trusted and reputable product, making it a valuable addition to any business or industrial setting. Plus, with free shipping included, you can easily get this essential tool delivered to your location quickly and efficiently.dont have a lot of knowledge in this area so look at pictures for more information they are part of the description. shipping price for lower 48 states. location bin 5.