TAJIMA Sef Safety Holder Tape Measure 5.5 m 25 mm Size:5.5 m × 25 mm (CWM3S25 55BL) 7mm 20 (1 2 20 UNF) Chain Clamp 7mm 20 (1 2 20 UNF) 3 conforming to IEC 947 1 Complementary Control type Toggle Mounting mode Fixed mounting support Backplate Upside connection Front downside connection Front Mechanical durability 10000 cycles Electrical durability Category A: 5000 cycles 415 V AC 50 60 Hz conforming to IEC 60947 2 Connection pitch 35 mm local signalling Positive contact indication Neutral protection setting Without protection earth leakage protection Without height 165 mm Width 105 mm Depth 60 mm Environment Standards EN IEC 60947 2 One touch attach and release to a Sef belt holder On scaffolding and steelwork that is what keeps the tape from being the thing that falls