TRA704T 1/4" STANLEY STAPLE HVY-DUTY 1000CT | 1000-pack of 5/16 in heavy-duty narrow crown staples are convenient and reliable. Used for heavy-duty stapling jobs such as insulation carpet underlayment and roofing felt, these staples come in sturdy plastic packaging to helps reduce breakage of the stick. With color-coded packaging, you can easily choose the correct brads for the project you are working on.