Brass tacks for securing your work to stretcher bars. Includes 60 tacks and built in metal tack remover. Ever so slightly larger with a slightly sharper point between Toraya tacks and Clover tacks. If you mount canvases frequently you may want to consider purchasing a Cor-Jac tool available separately. ( It saves your thumbs and makes it so much easier to mount.). You may find a screw driver helpful to slide open the lid.