[DETAIL] Specification： Material：Chromium vanadium alloy steel Size：1/2：12.7mm/0.5in；7.4cm/2.91inch; 6.35mm0.25inch 3/8：9.5mm/0.37in; 6.5cm/2.56inch; 6.35mm0.25inch 1/4：6.35mm0.25inch; 6.5cm/2.56inch Feature: -Chromium vanadium alloy steel has high forging hardness and long wear resistance life -The anti stripping steel ball is not easily detached when using a sleeve -Blackened surface treatment, overall blackening surface treatment, sturdy and wear-resistant -Bright colored circle hexagonal handle with double R grooves suitable for wind and electric batch use Package included: 6pcs Steel ball connecting rod（3pcs color+ 3pcs Black color） Notice: 1. Due to manual measurement, please allow a deviation of 1cm/0.4inch. 2. Due to differences in lighting and screen, the color of this product may differ slightly from the image. [ATTRIBUTES] - Hign-concerned Chemical: None - Origin: Mainland China - Hign-concerned Chemical: None - Origin: Mainland China