The Kuryakyn 1671 standard accessories mount allows you to attach your cell phone, MP3 player and almost any portable device directly to your handlebars. Mounting plates feature 4-hole AMPS pattern (industry standard hole configuration for mounting accessories). When not in use, a simple clamp is all that is left on your bar. Hook-&-loop straps included. Accepts most belt clips. Includes (1) black, standard accessory mount handlebars, (1) top and bottom half clamp, (1) hardware kit containing: (2) black, 1" bar reducer, (2) black, 7/8" bar reducer, (1) 1/4" flat washer, (1) 1/4" lock washer, (1) 1/4"-20 low crown acorn nut, (6) #8-32 x 3/4" phillips head pan screws, (6) #8-32 nylock nuts, (8) #8 SAE flat washers, (4) 6" black nylon cable ties, and (1) anti-seize package; tool suggested for installation (not included): small phillips head screwdriver, combination wrenches. The Kuryakyn 1671 standard accessories mount is ideal for iPhones and smartphones measuring 1 5/8" to 3 5/8" wide; compatible with handlebar diameters 7/8", 1", and 1 1/4".