Dct 5 Star Knobs Kit 1/4In-20 Threaded Knob, Bolt With Knob, Clamping Knob, Pack Product Details TIGHTEN ADJUST JIGS, FIXTURES, FENCES: The DCT | 5 Star Knob T Track Knobs Kit with Bolts Washers 4-Pack is a package of screw-on clamping knobs that can be used on your existing saw fence, drill press, lathe, routing jig, fixture, feather board, or anywhere else that a 1/4-Inch-20 internal thread is required; Many 3/4-inch wide x 3/8-inch deep (19.1mm x 9.5mm) T-tracks will not only accept this knob set but will allow you to use the 1/4-inch T-bolts PERFECT SIZE: Knobs have a 2-inch diameter and 1-inch height (5.1cm x 2.5cm); T track knob threading has 1/4-inch (6.4mm) diameter and 20 threads per inch (if you turn a nut 20 revolutions it will move 1 inch); Bolts and washers are 1/4?-20 x 1-1/2-inch; Works with any material that is less or equal to 1-inch in thickness or any T-track that accepts standard 1/4-inch bolt heads EASY TO USE: Insert the bolt into the T-Slot head down with the screw facing upwards, place the washer on the threaded bolt facing upwards, thread the T knob onto the bolt, then lock the entire unit in place on your T-track; Ergonomic design of this plastic knob set allows for easy adjustment and tightening with maximum control and agility without the use of additional tools BUILT TO LAST: T knobs package includes plastic knobs that are constructed from polypropylene plastic with molded-in brass insert that will not strip; Bolts and washers constructed from steel PACKAGE CONTENTS: Tightening knob kit includes (4) T track knobs (1/4?-20 threaded knobs), (4) bolts, and (4) washers for your convenience; This T bolts and knobs pack is for use with a hold down clamp (sold separately) Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.