For daily swing exercises, improve the accuracy of the technique and practice the feeling of swing.The rod sleeve is pushed from the rod head to the grip direction.is pushed from the lower part aim at the mouth of the bayonet and pushes up.PRACTICE PUTTING SMARTER - Ensures proper ball alignment, club alignment, and setup position while promoting proper swing tempo allowing to form correct putting memoryAfter the installation is successful, then direction is adjusted.Colour:blackMaterial:plasticSize:12.7 x 4.5cmPackage Contents:1 x Golf putter sightOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.