Midwest Tool and Cutlery Company provides the finest and most reliable tools for any type of job. Siding Combo Tool. This is two tools in one. Provides contractors great valve and saving time on the job. Combo tool punches both the nail hole slot and a snap lock in vinyl siding. Punches or enlarges nail hole slot as needed. Snap lock punch to secure siding to finishing trim. Raised tab is used in cut edge of siding at top of wall or below window to secure siding.