The No. 423 is a1/8 open x1/16 flat x1/8 deep V-notched trowel. The front edge is square and notched for cutting in or spreading adhesive in tight areas like corners. The wooden handle is curved for comfortable grip. The handle bracket is welded to the spring steel blade. Add L to the No. 423 for left-handed model (i.e. No. 423L).