pivoted end of arm 712 is inserted into the hollow interior of arm 708 and pivotally connected thereto by a conventional hinging device such as hinging pin or shaft 716a at a location on arm 712 corresponding to a location on arm 708 between notches 728a and 728b and 720a and 720b a sudden taper 736 on the inside face of arm 712 decreases the diameter thereof in a direction from the hinged joint 716 to open end 712a on the inside face of the portion of arm 716 having the larger diameter a vise pad 740 is firmly attached a corresponding vise pad 744 is attached to the interior face 748 of the closed short side of arm 708 a latching mechanism is provided in the form of two nipples 752a and 752b on opposing sides of the free end 712a of arm 712 and corresponding receiver sockets 756a and 756b in use a tilt string not shown to be secured in place into notches 724a and 724b the lift string not shown is placed into notches 728a and 728b and the other tilt string not shown is placed into notches 732a and 732b the free ends 708a and 712a and then brought together until the latching mechanism engages at which point the first tilt string and lift string are prevented from moving relative to each other due to compression between the vise pads 740 and 744 while the other tilt string is free to move axially through the clip 704 it is to be understood that the above described arrangements are only illustrative of the application of the principles of the present invention numerous modifications and alternative arrangements may be devised by.