1 Inch Small Screw Eyes Metal Screw Hooks Ring Screws Fasteners Hardware Tools 120 Pcs. Silver Color:Silver By recording the elapsed time

By recording the elapsed time between the sound wave being generated and the sound wave bouncing back

This Case is a special DIY item and it include 9 pieces and 1 bags case accessories

Key sizes: 1/2

Self-leveling mode

1 Inch Small Screw Eyes Metal Screw Hooks Ring Screws Fasteners Hardware Tools 120 Pcs. Silver Color:Silver By recording the elapsed time1 Inch Small Screw Eyes Metal Screw Hooks Ring Screws Fasteners Hardware Tools 120 Pcs. 1 inch The screw hook eyes widely used for accessories such as ornaments, toys, craft gifts, various wooden handles, etc, Suitable for securely hanging light weight items such as lights, picture, arts, small rope cords, chains, and more , Perfect for hanging objects from walls, and is especially designed for light duty applications, Very easy twist the screw hook