Bosch HS1527 12 In. Tamper Plate Shank 3/4 In. Hex Hammer Steel Works with HS1828 tamper plate and HS1969 carbide bushing tool 12 In. long tamper plate shank Not interchangeable with bushing shank Designed for use with 3/4 In. hex hammers Shank necessary for use with tamper plate or carbide bushing head