DescriptionAlloy steel hammer, suspension stability. With self-locking function, it can be fixed on wood board or other low-hardness materials. With magnetic force, it can be automatically adsorbed on the steel surface. It can be quickly positioned, free to take the line, and easy to operate. Good choice for your building measuring.Features- Color: As shown.- Material: PVC plastic, carbon steel.- Size: About9.5 x 8 x 2cm.- Made of material, durable and safe to use.- With self-locking function, it can be fixed on wood board or other low-hardness materials.- With magnetic force, it can be automatically adsorbed on the steel surface.- It can be quickly positioned, free to take the line, and easy to operate.- Good choice for your building measuring.