Type-17 point enables easy driving with no predrilling and minimal wood splitting, 3/8 in. hex head with 0.48 in. integrated washer, Head is stamped with the Simpson Strong-Tie "" sign and fastener length for easy identification after installation, Serrated threads, 3/8 inch hex-driver bit included (replacement model BITHEXR38-134), A low-speed 1/2 inch drill with a 3/8 inch hex driver is the recommended tool for installation