Usage Tips:C3 tungsten carbide blades, high quality alloy steel body with anti-kickback design;(Please receive the coupon code on the product page when purchasing to get a more favorable price.) Includes 6 sizes of 3 finned, 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"); You can use the cookie cutter, screed, and stick to create panel slots in stile and rail cabinet doors. Important: Cutters should be used one at a time. Stacking knives without staggering blades and adequate support between bodies can bend and warp bodies when tightening. Features: 6-bit 3-wing countersink bit groover with 8mm shank 6 in the following sizes: 1.8mm,2.3mm,3mm,4mm,5mm,6.35mm(1/16", 3/32", 1/8", 5/32", 3/16" and 1/4") < p > 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. -recoil. You can use the cookie cutter, screed, and stick to create panel slots in stile and rail cabinet doors. Specifications:< /p > Stem size: 8mm Number of cutters: 6 Sizes of: 1.8mm,2.3mm,3mm,4mm,5mm,6.35mm(1/16", 3/32", 1/8", 5/32", 3/16" and 1/4") < p > Depth of cut: 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: Knives should be used one at a time. Stacking knives without staggering the blades and adequate support between the bodies can bend and warp the bodies when tightening. Please take protective measures to prevent splashing of wood chips to hurt your skin and eyes. Contents: 3-Wing Groove Bits Note: the data is a Manual measurements, please allow 1-3cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.