Hilti 00304398 DX 460-GR Fully Automatic Powder Actuated Grating Tool with Case Power source: Hilti .27 caliber short cartridges in strips of 10 8 mm piston bore Meets ANSI standard A 10.3 and OSHA requirements for low velocity tools Fasteners: X-CRM8-9-12P8, X-CRM8-15-12P8, X-GR-RU grating fasteners