5F1-PK2289BK – Cast metal construction. Finger Hole Width: 1 inch. Finger Hole Length: 1 1/8 inch. Total Width Of Belt Buckle: 4 1/2 inch. Total Length Of Belt Buckle: 2 5/8 inch. Thickness: 1/2 inch. These are the all-new and improve Heavy Duty Buckle Knuckles & Paperweight, which has a beautiful color coating over it. These belt buckle Knuckles have four finger holes that can fit any finger size. It also carries a pin which can fit on any belt hole.