Check the listing for details. WADE'S FLY-TYING BOBBIN/ THREAD CADDY. Condition: New. Listed at 19.90 USD. THE MAIN OBJECTIVE WAS TO GET TYING FAST! I PICK THE 13 THREADS I USE MOST OFTEN. HAVING 7 ALREADY ON THE BOBBINS LOADED AND READY TO GO SAVES TIME. THE THREADER IS RIGHT IN THE MIDDLE. FEATURES AND BENIFITS: THE ANGLE OF THE BACK MOVES THE WEIGHT OF THE BOBBINS FORWARD. THE PROTECTIVE SLEVES LINE THE DRILL HOLES PROTECTING THE BOBBIN. THE HOLES ARE 1 INCH PLUS DEEP CAUSING THE BOBBINS TO STAND AT ATTENTION THE BASE HAS HOLES 3/8 INCH DEEP. THEY FIT THE SIZE OF MOST THREAD SPOOLS. WHEN YOU RETURN THE SPOOL TO IT'S HOLE JUST WIND THE THREAD ON THE SPOOL. IT WILL FALL IN THE CAVITY HIDDEN FROM SIGHT. I USE MESQUITE WOOD BECAUSE IT IS VERY STRONG, I FINISH THIS ORGANIZER WITH POLYURETHANE TO PROTECT IT AGAINST SCRATCHES. THANKS FOR TAKING TIME TO READ. HAPPY TYING, WADE