The Master Lock No. 427 Labeled Red Safety Lockout Hasp features a 1-3/4in x 2-1/8in (45mm x 54mm) diameter inside jaw clearance and is designed to fit more lockout points than alternative rivet-hinge labeled lockout hasps. The anodized aluminum and stainless steel construction provides combined corrosion resistance and strength. A spring-loaded locking arm offers an easy-to-apply ‘snap-on’ advantage. Includes high-visibility, write-on safety labels to identify the responsible person.