Feature:

Must-have accessory set for power drills and impact drivers.
Extensions in lengths 6", 4" & 3" for superior access for hard-to-reach fasteners.
Strong permanent magnets hold bits securely in place; accepts all 1/4" hex-shank bits.
1/4" quick-change hex shanks fit all power drills, 1/4" impact drivers and hand-held drivers.
Hardened tempered tool steel with chrome-finish holders manufacturer's.

Specification:

Type: Bit Holder    
Feature: Magnetic
Shank Type: Hex
Drill Bit Type: Screwdriver Bit
Material: Steel
Color: Silver

Model: 3pcs
Net Weight: 0.09kg/ 0.2 lbs
Product Size: 75mm 100mm 150mm 

Package Size: 18x3.5x0.8cm/ 7.1x1.4x0.3 inch
Shipping Weight: 0.1kg/ 0.22 lbs

Package Included: 

1 x 75mm Extension Bit Holder
1 x 100mm Extension Bit Holder
1 x 150mm Extension Bit Holder