Johnny Ray Swivel Mount w/ Sliding Lever Release For Graph Units 5.500" W Hole x 1.250" D Hole. Some units are compatible but are not a direct match see manufacturer recommendations for installation. The hole pattern in the JR-207 is 5.500" hole width by 1.250" hole depth. Features a maximum weight capacity of 14 lbs. and a 1.500" shaft diameter by 5.000" square mounting area. Molded from DuPont Nylon and assembled with stainless steel springs and screws. Specifications for Johnny Ray Swivel Mount With Sliding Lever Release For Graph Units 5.500" W Hole x 1.250" D Hole: Manufacturer: Johnny Ray Quantity: 1 Features of Johnny Ray Swivel Mount With Sliding Lever Release For Graph Units 5.500" W Hole x 1.250" D Hole Automatic 360 ratchet rotating 24 position automatic locking top Sliding lever release top removal feature Features a maximum weight capacity of 14 lbs. and a 1.500" shaft diameter by 5.000" square mounting area Hole Pattern: 5.500" hole width by 1.250" hole depth Package Contents: Johnny Ray Swivel Mount With Sliding Lever Release For Graph Units 5.500" W Hole x 1.250" D Hole Johnny Ray JR-207: Swivel Mount w/ Sliding Lever Release For Graph Units 5.500" W Hole x 1.250" D Hole