McKinney Full Surface Double Acting Door Spring - 451/452/453 Simplified method of closing doors. This economical series is designed to be surface applied to the door and frame Coil springs made of high grade steel wire Adjustable tension, no special tools required Wrought steel brackets prevent breakage All 450 Series are finished in D4 (black) and are packed with 1x12 wood screws Specification Close Full Line Catalog Full Line Catalog Close Interested in this product? Contact us to order Related products McKinney Residential 3 1/2" Spring Hinge - 1502/1552 McKinney Full Mortise Single Acting Spring Hinge: Standard Weight - 1502/1552 McKinney Ajax Double Acting Horizontal Spring Pivot Hinge - 3001/J3001