Alpha phillips drive insert bits have a short shank and fit into magnetic bit holders. They are made from hard, magnetised steel (10/pack). Features: Optimal hardness for durability and resistance to wear Superior magnetism for additional stability and greater performance Prevents cam out and damage to fasteners Available in sizes PH 1 x 25mm, PH 2 x 25mm, PH 3 x 25mm and PH 4 x 25mm Alpha phillips drive insert bits – quick reference Code Size Qty PH125S PH 1 x 25mm 10 PH225S PH 2 x 25mm 10 PH325S PH 3 x 25mm 10 PH425S PH 4 x 25mm 10 Phillips drive insert bits are often referred to as screw tips.