Hello - Our 1/2" and 9/16" staples have a chisel (flat) point; 1/4", 5/16" and 3/8" have divergent (pointy) tips. Chisel points help longer staples drive into the wood. It is possible that the 1/2" staples are too long for your application. Take a look at our staple guide to help with staple selection: https://bit.ly/3fJdrRS. Also, here's a video that offers additional information: https://bit.ly/3A5OV5O. Hope this helps! - Your Arrow Fastener Team