Dl-Lck Reclosable Fastener 400

3M(TM) Dual Lock(TM) Reclosable Fastener 400 SJ3252 Black, 4.22 mm, 1000 per case Black, polypropylene reclosable fastener with rigid backing, rigid backed square with 2 holes 400 stems per square inch 3M (TM) Dual Lock (TM) Reclosable Fasteners have been used extensively in transportation, electronics, business equipment, machinery, medical and sign and display markets. When the mushroom-shaped stems interlock, tensile strength is high enough to replace mechanical fasteners in many applications, yet you can readily open and close Dual Lock fasteners hundreds of times. High temperature and solvent resistant. Rigid backed Dual Lock are designed for mechanical attachment like riveting or popping into place