Sliding magnet system provides bolt clearance and magnetic function at the same time. Input Drive Size: 1/2" Drive Shape: Square Length: 80mm Type: Impact Socket with Sliding Magnet Output Size: 17mm Opening: 6pt Slide Magnet: Yes Product Dimension (Refer Line Drawing Image): D1 Size: 25.7mm D2 Size: 30mm H1 Size: 8mm H2 Size: 26.5mm L Size: 80mm