All of the Stanley Powerlock tape measures have the "Tru-zero" feature that allows the hook end of the tape to slide 1/16" of an inch to compensate for the hooks own thickness. The yellow blade has large easy-to read numerals for quick measuring to within 1/32 of an inch. The blades are protected with a clear tough film of Mylar. The slide lock allows the tape to be locked in place at any point along its length. The 25' tape has a 1" wide blade, while the others have a tape width of 3/4". The 16'/5m tape measures in both inches and meters (Tol = 1mm).