The IRWIN® Blue Groove 4X Flat Bits have a patented groove point and cutting edge, designed to cut and not scrape the timber. They are 4 times faster than standard flat bits. The parabolic scoop optimises control and removal of wood chips. Increased relief angle from 12° to 17°. The shank is 152mm in length and 10% larger in diameter for added durability. This IRWIN® Blue Groove 4X Flat Bit Set is supplied in a hard, case. Contains the following: Sizes (Ø): 12, 16, 18, 20, 22, 25, 28 and 32mm. https://elecena.pl/product/27221680/irwin-iw4041010-blue-groove-4x-flat-bit-set-8-piece 2024-11-11 https://elecena.pl/product/27221680/irwin-iw4041010-blue-groove-4x-flat-bit-set-8-piece 2025-02-20 https://elecena.pl/product/27221680/irwin-iw4041010-blue-groove-4x-flat-bit-set-8-piece 2025-03-12 https://elecena.pl/product/27221680/irwin-iw4041010-blue-groove-4x-flat-bit-set-8-piece 2025-09-18 https://elecena.pl/product/27221680/irwin-iw4041010-blue-groove-4x-flat-bit-set-8-piece 2026-03-17 https://elecena.pl/product/27221680/irwin-iw4041010-blue-groove-4x-flat-bit-set-8-piece 2026-07-10 https://elecena.pl/product/27221680/irwin-iw4041010-blue-groove-4x-flat-bit-set-8-piece 2026-10-12