ITEM NAME:8x Socket Bit Adapter Hexagonal Handle Square Head Sleeve Conversion Bars Set Description: Hex Shank Prevents Stripping During High Speed Drill Operation. Durable and practical, high quality, smooth finish. Suitable for a screwdriver handle or electric screwdriver tool drive sleeve to use. After install the original hexagonal size can be converted to square head size. Used in home DIY, carpentry, auto parts, machine repair and so on. Specification: Material: Metal Size Chart: 1/4 * 1/4 * 50mm Length: 1/4 '' shank can be converted to 6.35mm square head 3/8 * 1/4 * 50mm Length: 1/4 '' shank can be converted to 9.53mm square head 1/2 * 1/4 * 50mm Length: 1/4 '' shank can be converted to 12.7mm square head 1/4 * 1/4 * 65mm Length: 1/4 '' shank can be converted to 6.35mm square head 3/8 * 1/4 * 65mm Length: 1/4 '' shank can be converted to 9.53mm square head 1/2 * 1/4 * 73mm Length: 1/4 '' shank can be converted to 12.7mm square head 1/4 * 1/4 * 25mm Length: 1/4 '' shank can be converted to 6.35mm square head 1/4 * 1/4 * 30mm Length: 1/4 '' shank can be converted to 6.35mm square head Package Includes: 8 Pieces/set Socket Bit Adapter.After install the original hexagonal size can be converted to square head size. Suitable for a screwdriver handle or electric screwdriver tool drive sleeve to use. Hex Shank Prevents Stripping During High Speed Drill Operation.