An adaptor (10) for a fastening tool (12) having an attachment portion (18) for coupling the adaptor (10) to the fastening tool and a support (14, 16) for coupling a mounting bracket (26) to the adaptor (10), arranged so as to hold the mounting bracket (26) relative to a substrate and allow a fastener from the tool to be driven through the mounting bracket to secure the mounting bracket to the substrate (52). A holder for holding an item to facilitate attachment of said item to a substrate by a fastener, wherein the holder magnetically retains the item in a position to receive the fastener from a fastener tool. A method of securing a mounting bracket to a substrate including the steps of coupling the mounting bracket (26) to an adaptor (10) which is arranged so as to hold the mounting bracket relative to a fastening tool (12), supporting the mounting bracket in position relative to the substrate (52), and operating the tool to drive a fastener through a mounting portion of the mounting bracket to secure the mounting bracket to the substrate.