Stainless steel ara rod holder. The rod holder swings and has a built-in spring. The stone-butt box size is: Front: 58 x 40 mm Rear: 58 x 30 mm Depth: 59 mm The pin holes for the butt end are 9mm holes located 20mm and 35mm from the front. Removing it allows you to remove the rod keeper. The anchor bolt hole diameter is 13mm. The rod is a Daiwa Carbon Whisker Senkaku No. 100 484. Rod and reel rod keeper are not included. Limited sale of only 3 units. Please check the stone-butt box size before purchasing.