BT8M - Fisco Big T Metric Tape Measure 1" Wide x 8m Long World's most accurate tape measure. Meets Class I accuracy. Patented snap-on belt hook holds tape securely and prevents it from accidentally dislodging. Durable clear-coated steel blade that won't reflect in outdoor applications. Rubber over-molds at key stress points & internal shock absorbers protect the tape during use. 4-rivet clear-view and self-zeroing end hook for full view of increments and extra blade durability.