Dl-Lck Reclosable Fastener 400

3M(TM) Dual Lock(TM) Reclosable Fastener 400 SJ3921 Black, 1/2 in x 45 yd, 16 per case Mix and Match 400 reclosable fastener SJ3921 Black varying adhesives 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. Mix and Match program allows a customer to match their adhesive requirements with the reclosable strength required to meet their needs.