3M Clear Dual Lock closure with clear acrylic adhesive. Ideal for POS display manufacturing as well as commercial signage and commercial vehicles. Dual Lock has five times more holding power than 3M hook and loop. SJ3560 is for general purpose signage carrying 250 teeth per square inch and has engaged thickness of 5.7mm. SJ4570 is for low profile applications carrying 705 low profile teeth per square inch and has engaged thickness of 2.5mm. This product must be sold in multiples of two rolls.