The Stop Function Heavy Duty Concealed Mount Closer Arm is for interior or exterior use on frequent traffic and heavy weight doors. Can be used on single or double acting doors with hinges, swing clear or offset pivots or center hung doors. Shock absorbing spring provides a 3 to 5 degree cushion before a dead-stop.Features: Concealed Mount Heavy Duty Stop function applied Singe or Double acting doors Non-handed For Interior or exterior use on frequent traffic and heavy weight doors NOTE: This Item Does NOT Qualify for FREE Shipping - Please contact your sales representative to get shipping costs. Call 1-800-878-6604 between Monday and Friday 9AM-6PM EST Specifications: Function: Stop Function Door Thickness: 1-3/4" minimum Frame Opening: 85° to 110° of opening (5° increments) Door Width: Fits butt hinges or offset pivots 27” - 29-15/16”. 30” - Center Hung 32-15/16” Handing: Non-handed Spring: Shock absorbing spring provides 3° to 5° cushion before dead-stop Material: Stainless Steel Finish: Satin Stainless Steel Mounting Style: Concealed Certification: ANSI Code C01541, UL Listed 90min. wood and 3hr metal doors Downloads: Spec Sheet Installation Guide