C3 tungsten carbide blades, high quality alloy steel body with anti-kickback design. Includes 6 sizes of 3 finned cutters with 8mm shank and 22mm (7/8") bearing. 6 slot cutter sizes: 1.8mm, 2.5mm, 3mm, 4mm, 5mm, 6.35mm (1/16", 3/32", 1/8", 5/32", 3/16", and 1/4"). Cutting depth: 12.7mm (1/2"). Overall length: 70mm (2-7/8"). Can be used to create panel slots in stile and rail cabinet doors. Important: Cutters should be used one at a time. Stacking cutters without staggering blades and adequate support between bodies can cause bending or warping when tightened. Features: 6-piece 3-wing countersink bit groover set with 8mm shank. Sizes: 1.8mm, 2.3mm, 3mm, 4mm, 5mm, 6.35mm (1/16", 3/32", 1/8", 5/32", 3/16", and 1/4"). C3 carbide for long life and professional cut quality. Fully heat-treated body and barrel for increased durability. Build-up resistant coating and anti-scratch design. Anti-kickback design. Specifications: Shank size: 8mm Number of cutters: 6 Sizes: 1.8mm, 2.3mm, 3mm, 4mm, 5mm, 6.35mm (1/16", 3/32", 1/8", 5/32", 3/16", and 1/4") Cutting depth: 12.7mm (1/2") Cutting diameter: 47mm (1-7/8") Overall length: 70mm (2-7/8") Bearing outer diameter: 22mm (7/8") Material: Carbide Tipped Important notice: Cutters should be used one at a time. Stacking without proper blade staggering and support may bend or warp the bodies during tightening. Use appropriate safety measures to protect against flying wood chips and debris. Contents: 3-Wing Groove Bits Note: Measurements are manually taken; please allow 1-3cm variation. Color may vary slightly due to lighting and screen differences. Actual product may vary slightly from images.